Source: Chengalpattu NIC, Thanjavur district profile, IndiastatPub (Refs S2/S8)
Source: Census 2011 via IndiastatPublications (Ref-S2). AC-level caste data not officially enumerated — aggregate framing only.
DMK CANDIDATE 2026 (CONFIRMED)
R. Vaithilingam
Dravida Munnetra Kazhagam (SPA)
Former AIADMK MLA 4 terms · Won 2021 with 90,063 votes (46.95%) · Resigned MLA seat Jan 2026 · Joined DMK
HIGH confidenceSource: The Week, The Statesman (Ref-S5/S6). DMK's rationale: Vaithilingam was Orathanadu's only remaining AIADMK-held seat in Thanjavur district — his defection gives DMK a realistic path to sweep all 8 Thanjavur seats.
⚠ Strategic implication: DMK now controls both incumbent credibility AND ruling party machinery. This is the hardest opponent profile TVK faces in any Thanjavur seat.
TVK CANDIDATE (USER-PROVIDED)
Dr. K Aravind
Tamilaga Vettri Kazhagam (TVK)
Doctor (MBBS/MD — qualification to be confirmed) · TVK 2026 candidate · Announced per TVK official list 29 Mar 2026
MID — user-provided, verify at ECI affidavit portal on nomination date⚠ Dr. Aravind's specific background (MBBS/MD, specialisation, prior community work) not independently confirmed in searched sources. His "Doctor" credential must be prominently verified and promoted — it is his single strongest differentiator in a rural healthcare-gap constituency.
OTHER 2026 CONTESTANTS
AIADMK (NDA): INSUF — New candidate required as Vaithilingam resigned and joined DMK. AIADMK (EPS faction) must field a fresh SC candidate in this General (unreserved) seat. Candidate name not confirmed.
NTK: Contesting all 234 seats solo. Candidate name for AC175 not found. INSUF
PMK: PMK is in NDA alliance (18 seats). Orathanadu likely allotted to AIADMK within NDA — PMK unlikely here. Verify at PMK candidate list.
Alliance: TVK solo · DMK+SPA (Vaithilingam) · AIADMK+NDA (new candidate) · NTK solo
Sources: ADR/ECI Official Press Release TN 2021 (Ref-S3), resultuniversity.com (Ref-S7), Oneindia (Ref-S1), IndiastatPub (Ref-S2). Gaps marked N/A — verify at eci.gov.in.
| YEAR | WINNER | PARTY | VOTES | VOTE% | RUNNER-UP | PARTY | VOTES | MARGIN | VALID VOTES | TURNOUT | SOURCE |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | Vaithilingam R | AIADMK (now DMK) | 90,063 | 46.95% | Ramchandran M | DMK | 61,228 | +28,835 (15.03%) | 191,840 | 78.24% | ECI via ADR |
| 2016 | Ramchandran M | DMK | 84,378 | ~46.9% | Vaithilingam R | AIADMK | 80,733 | +3,645 (razor-thin) | 180,023 | N/A | ECI via resultuniversity |
| 2011 | N/A | AIADMK | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | INSUF — verify eci.gov.in |
| Note: AIADMK won 6 times, DMK won 4 times since 1977 (Source: Oneindia). Historical pattern shows alternate dominance — no party has structural lock-hold. | |||||||||||
WINNING MARGIN TREND (2016 vs 2021)
Key pattern: In 2016, Ramchandran M (DMK) beat Vaithilingam R (AIADMK) by just 3,645 votes. In 2021, Vaithilingam flipped it and won by 28,835. Same two candidates, same constituency, extreme swing. The 2026 contest now has Vaithilingam running as DMK — making him a double threat: he can claim both the 2021 46.95% personal vote base AND the 2016 DMK's 46.9% base. This is why this is rated difficult for TVK.
| RANK | CANDIDATE | PARTY | VOTES | SHARE | TVK 2026 RELEVANCE |
|---|---|---|---|---|---|
| 1 | Vaithilingam R | AIADMK → DMK 2026 | 90,063 | 46.95% | He is now the DMK 2026 candidate. TVK's hardest opponent. |
| 2 | Ramchandran M | DMK | 61,228 | 31.92% | DMK 2021 runner-up. In 2026, Vaithilingam replaces him as DMK candidate — Ramchandran M's fate is unknown. Internal DMK friction possible. |
| 3+ | NTK + MNM + Others | Various | ~40,549 est. | ~21.13% | TVK's PRIMARY ACQUISITION TARGET — this third-space vote is the campaign's most critical conversion pool. INSUF — exact candidate-wise breakdown not retrieved. Verify at ECI TN 2021 stat report for AC175. |
| — | NOTA | — | 867 | 0.45% | Protest voters — potential TVK converts |
Third-space estimate: Total valid votes 191,840 − VCK 90,063 − DMK 61,228 − NOTA 867 = ~39,682 for remaining candidates. This is the pool Dr. Aravind must consolidate plus draw from AIADMK's new-candidate base.
INFERENCE Vaithilingam carries both personal voter loyalty (built over 4 MLA terms) AND the full DMK state machinery. In 2021, he won with 46.95% — and that was as AIADMK against a sitting DMK wave state. In 2026 he runs AS DMK during DMK incumbency. The theoretical ceiling of his vote is 60-65% in a straight fight. TVK's only realistic path: consolidate the full third-space vote (~21%), draw hard from a demoralised AIADMK new-candidate base, and rely on Vijay's youth brand to mobilise first-time voters who are genuinely outside both traditional camps. Win requires TVK at 30%+ which is achievable but requires flawless execution in a constituency where TVK starts from zero.
DMK · SPA ALLIANCE · FORMER 4-TERM AIADMK MLA · DEFECTED JAN 2026
ALL INDIA ANNA DMK · NDA · CANDIDATE NOT CONFIRMED
Vaithilingam (AIADMK 2021 winner, 46.95%) defected to DMK in January 2026 and is their 2026 candidate. AIADMK must field a new candidate. TVK contests its first election here. AIADMK won 6 times, DMK 4 times since 1977. 2016: DMK won by 3,645; 2021: AIADMK won by 28,835. (Refs S1–S7)
The political landscape is entirely disrupted by the defection. Orathanadu in 2026 is not a standard bipartite AIADMK-DMK contest — it is a contest between a defector-backed DMK, a leaderless AIADMK, and a debut TVK. The dominant narrative the campaign must shape is: "Career politician changes party for power vs young doctor committed to constituency for service."
Vaithilingam's defection is the campaign's central narrative opportunity. Every voter in Orathanadu knows he switched parties. Dr. Aravind must own the counter-narrative on Day 1: "I am not here to switch parties. I am here to serve Orathanadu." Consistency of commitment versus opportunism is the framing.
If elected as TVK opposition MLA, Dr. Aravind must file an RTI by Week 2 on Vaithilingam's 5-year MLACDS utilisation — documenting what was and was not delivered for Orathanadu's farmers during the 2021–2026 term.
Orathanadu is in the Cauvery delta — Thanjavur district is "Rice Bowl of Tamil Nadu." Paddy cultivation (Samba, Kuruvai, Thaladi) is the primary occupation of 93% rural population. Cauvery water release from Karnataka determines agricultural output. Thanjavur PC won by DMK's Murasoli in 2024 with a margin of 319,583 — demonstrating strong SPA alliance dominance at parliamentary level. (Refs S1/S8)
Paddy MSP inadequacy, irregular Cauvery water releases, rising input costs (fertiliser, diesel pump irrigation), and crop insurance delivery gaps are the structural economic grievances that have persisted across AIADMK and DMK governments alike. Vaithilingam — who has been MLA for 4 terms — carries the accountability burden for this. Dr. Aravind can frame healthcare access as an economic security issue for farming families.
Hold a Paddy Farmers' Assembly (Ula Vivasayigal Kootam) in the first 10 days — Dr. Aravind listens to specific farmer grievances about Cauvery water, eri desilting, and crop insurance claims. This is not a campaign rally — it is a constituency intake exercise. Document it publicly.
If elected, table a motion demanding the TN Agriculture Department publish Cauvery water allocation reach data for Orathanadu block farmers — holding the state government accountable for delivery of water rights to cultivators.
93.02% rural, 276,272 population (Census 2011). SC 17.14%. Predominantly agricultural households. Thanjavur delta society is traditionally structured around land ownership and temple economy. Historical pattern shows both AIADMK and DMK have governed alternately with no permanent community lock-in.
Vaithilingam's 4-term MLA legacy has built deep patron-client networks in the constituency — community leaders, panchayat heads, agricultural cooperative managers, and rural traders who have received government benefits through his tenure. These networks will likely follow him to DMK. Identifying the pockets where these networks are weakest is the BSAI research priority for Dr. Aravind.
Dr. Aravind's "Doctor for the Delta" identity must be lived, not just claimed. Conduct minimum 2 free health camps in Orathanadu block villages before polling day — personally delivering medical services, not just promising them. This single visible action differentiates him from every career politician in the field.
As MLA, Dr. Aravind can table a motion demanding a Primary Health Centre upgrade in Orathanadu town with specialist outreach days — directly applying his medical expertise to a documented rural healthcare gap.
Orathanadu's agricultural economy is increasingly dependent on pump irrigation (groundwater supplementing Cauvery canal) — power supply reliability is critical for farmers. Mobile penetration has increased rapidly in Thanjavur rural areas — WhatsApp and social media are now the primary campaign information channels for rural youth. Precision farming adoption is low but increasing through TNAU (Tamil Nadu Agricultural University) extension programmes.
The digital campaign in Orathanadu must be bilingual (Tamil primary, with simple visual content for agricultural community) and WhatsApp-first rather than Twitter/Instagram-first. Farmer-specific content — paddy cultivation cycle calendar, eri water level monitoring, crop insurance filing guides — would build genuine utility-based followership before the election converts it to votes.
Create a "Dr. Aravind Farmers' WhatsApp Channel" with weekly agricultural advisories tied to the paddy cultivation cycle — a campaign tool that also serves as a genuine farming resource. This is a TVK innovation no other party candidate in Orathanadu will replicate.
Advocate for a TNAU extension office with digital connectivity in Orathanadu block — providing precision farming and soil health card services to farmers who currently travel to Thanjavur town for advisory access.
The Cauvery delta's traditional tank (eri) irrigation system is the environmental backbone of Orathanadu's agriculture. Tank desilting and restoration is a documented priority under TN government programmes. The Grand Anicut / Kallanai dam system built 2,000 years ago by Karikala Chola is the water distribution backbone for this region. Thanjavur district faces groundwater depletion from deep-bore extraction. (Ref-S8)
Eri desilting is a uniquely powerful campaign issue for Orathanadu — it directly connects to farming livelihoods, it is visually verifiable, and it is 100% within MLA-deliverable scope through MLACDS and MGNREGS convergence. If Vaithilingam's MLACDS fund shows zero eri desilting projects in the constituency, this is a documented delivery failure exploitable by Dr. Aravind with RTI evidence.
Name the specific eri (tank) in Orathanadu taluk that has been silted up longest without desilting — ideally one that directly affects paddy cultivation in 3+ villages. Make the restoration of THIS specific eri Pledge #2 of the campaign manifesto.
File an RTI for MGNREGS eri desilting work orders in Orathanadu block for 2021–2026 to verify if Vaithilingam directed MLACDS funds toward this purpose. The answer is the campaign's most powerful evidence point either way.
ECI Model Code of Conduct in force since election announcement. Polling 23 Apr 2026. Nomination filing 30 Mar–6 Apr 2026. All outputs comply with RPA 1951, DPDPB 2023, ECI MCC. Vaithilingam resigned MLA seat before joining DMK — ensuring no anti-defection provisions applied (the Tenth Schedule applies only to sitting party members, not those who resigned their seat).
MCC prevents Vaithilingam from announcing new government schemes from his DMK position — the ruling-party advantage of late scheme announcements is neutralised. Dr. Aravind can freely make legislative pledges (bills, motions, RTIs) that Vaithilingam cannot match with government programme announcements during the campaign window.
File 3 RTI applications before the campaign's first week ends: (1) Vaithilingam's MLACDS utilisation 2021–2026, (2) eri desilting work status in Orathanadu block, (3) PHC specialist vacancy status in Orathanadu taluk. These are public record, legally obtainable, and campaign-deployable even if data arrives after polling (the filing itself is a narrative act).
If Dr. Aravind wins, his first Assembly session priority list: (1) MLACDS audit motion, (2) Cauvery water allocation accountability question, (3) Orathanadu PHC specialist appointment demand. All three are drafts he can prepare before the election to demonstrate governance readiness.
| RESOURCE | TYPE | V | R | I | N | O | S | COMPETITIVE POSITION | CONF |
|---|---|---|---|---|---|---|---|---|---|
| "Doctor" credential in rural healthcare-deficit constituency | Intangible | Yes | Yes | Yes | Yes | Yes | Yes | Sustained competitive advantage — no other candidate in the field is a doctor. In a constituency where PHC doctor vacancies are a documented issue, a candidate who IS a doctor has a structurally irreplaceable differentiator. Must be lived, not just claimed. | HIGH |
| Vijay TVK brand + youth mobilisation | Intangible | Yes | Yes | Yes | Yes | Partial | Partial | Statewide advantage but Vijay absent from Orathanadu personally (contesting Perambur + Trichy East). Youth vote activation depends on TVK district cadre energy. In rural Thanjavur, Vijay's fan base exists but converting it to votes in an AIADMK-strong constituency requires field work. | MID |
| "Vaithilingam defector" anti-narrative opportunity | Political | Yes | Yes | Partial | Partial | No | Yes | Uniquely available in this constituency — no other Thanjavur seat has a defector as the main DMK candidate. TVK can claim the "consistent commitment" high ground that DMK cannot. Must be evidence-based: Vaithilingam's party change documented, his benefits from the switch documented, his delivery record audited. | MID |
| Third-space 2021 vote (~21%, ~39,682 votes) | Political | Yes | No | No | No | No | Yes | TVK's primary arithmetic conversion opportunity. Not a TVK resource today — it is the campaign's number-one acquisition objective. NTK and MNM 2021 voters in Orathanadu must be actively converted with explicit messaging. | MID |
| AIADMK residual base (without Vaithilingam) | Political | Yes | No | No | No | No | Partial | AIADMK's 2021 base (46.95%) will not transfer wholesale to a new AIADMK candidate. The personal loyalty premium Vaithilingam carried is now with DMK. Estimated residual AIADMK organisational vote: 25–35%. TVK must pick up 8–12% of this by positioning as a stronger anti-Vaithilingam choice than the unknown AIADMK candidate. | LOW — speculative |
| Paddy farmer grievance ownership | Political | Yes | Partial | Partial | Partial | No | Yes | Available to all parties. TVK can claim first-mover advantage on the Cauvery-specific agricultural accountability narrative — if the MLACDS RTI and eri desilting RTI are filed and publicised before AIADMK and DMK can respond. Speed is the only moat here. | MID |
| Free health camp as campaign asset | Tangible | Yes | Yes | Yes | Yes | Yes | Partial | A doctor candidate holding free health camps in villages is uniquely credible and legally MCC-compliant (it is a service activity, not a scheme announcement). No career politician candidate can replicate this with equivalent authenticity. If Dr. Aravind holds 3 free health camps before polling day, this alone can swing 3,000–5,000 votes. [INFERENCE — no data basis for vote estimate] | MID |
| TVK booth agent network TN-level | Structural | Yes | Partial | Partial | Partial | Partial | Yes | Statewide resource but Orathanadu's 340 booths in a rural delta constituency require deep field presence vs Vaithilingam's 4-term MLA network. TVK booth depth in Orathanadu is unverified and likely thin relative to DMK/AIADMK. Must be verified and reinforced within 72 hours. | LOW — depth unverified |
FACT 93.02% rural · Primary crop paddy · Cauvery water dependency · Rain-supplemented irrigation
INFER PHC coverage in 93% rural constituency · Doctor vacancies documented across TN rural PHCs · Dr. Aravind's unique credential
FACT Traditional tank (eri) irrigation is the Cauvery delta's water backup system · Groundwater depletion rising in Thanjavur district
INFER TVK's natural base · First-time voters from agricultural households · Rural youth employment deficit in delta region
FACT SC 17.14% · Agricultural labour households · Paddy harvest employment · MGNREGS coverage
INFER 340 polling stations across rural delta · Interior village connectivity during northeast monsoon flooding is a documented gap
Primary target: Vaithilingam's 5-year MLACDS delivery record AND his party defection. These are two separate accountability attacks that must be kept distinct. The delivery attack is governance-based; the defection attack is character-consistency-based. Never conflate them.
Delivery attack: File RTI for MLACDS fund utilisation 2021–2026 in Orathanadu AC. If eri desilting was not funded, roads were not built, PHC was not upgraded — this is specific documented failure, not generic anti-incumbency. Use RTI data, not allegations. Frame: "Four terms as MLA. One term as Rajya Sabha MP. Now DMK candidate. After 20 years, where are Orathanadu's eris? Where is the specialist doctor in the PHC?"
Defection attack: "In 2021 you voted for AIADMK. Your MLA took your votes, took his seat, and in January 2026 traded them to DMK for a ticket. That vote was yours — not his to sell." Make this personal, verifiable, and factual. Wikipedia and The South First (Ref S4/S5) confirm the exact date and conditions of his defection.
Key message: PROPOSAL "Vaithilingam has won 4 elections in Orathanadu. He has also lost one, switched parties twice, and spent 20 years managing his career. Dr. Aravind has one goal: to manage your health and your harvest."
Core coalition to protect: NTK/MNM/protest vote (~21% in 2021) plus the AIADMK voters who feel orphaned by Vaithilingam's defection. These are the voters who need reassurance that a TVK vote is not a wasted vote. In a 4-way race where DMK+Vaithilingam may poll 45-55%, TVK at 30% could still finish second — and "not wasting your vote" requires anchoring TVK's vote pool above 25%.
Cited local deliverable: Eri restoration is the stability pledge — an existing government mechanism (MLACDS + MGNREGS convergence), fully within MLA authority, visible, and verifiable. "I am not asking you to trust a new party. I am asking you to trust a specific commitment: this specific eri, restored in 24 months, documented publicly."
Key message: PROPOSAL "You do not need to be sure I will win to vote for me. You need to be sure I will keep every promise I make — regardless of which bench I sit on in the Assembly. Dr. Aravind: one constituency, one commitment, zero party switches."
Vision: "Orathanadu 2031 — Healthy Farms, Healthy Families." Two innovations: (1) Orathanadu Agricultural Health Clinic — Dr. Aravind will use his medical expertise to establish a monthly free occupational health clinic specifically for paddy farmers and agricultural labourers — diagnosing pesticide exposure conditions, musculoskeletal injuries, and heat-stress conditions that are never addressed in generic PHC settings. (2) Orathanadu Eri Digital Map — an open, publicly maintained digital map of all eris in the constituency showing siltation levels and desilting schedule — complete governance transparency tool funded through MLACDS.
Event: "Orathanadu 2031 Paddy Farmers' Vision Meeting" — held at a village with a silted eri — invite TNAU extension officers, panchayat heads, and local agricultural cooperative leaders. Position Dr. Aravind as the constituency's first candidate with a both a medical AND an agricultural development vision for the delta.
Key message: PROPOSAL "Thanjavur fed India for a thousand years because our farmers were our engineers. Dr. Aravind's Orathanadu 2031: farmer health clinics, restored tanks, and a doctor-MLA who treats both your paddy and your family."
Who to protect: Three specific vulnerable groups: (1) SC agricultural labour families facing paddy mechanisation income displacement, (2) women farmers and agricultural labour women in interior delta villages with zero healthcare access, (3) young farmers who inherited small paddy holdings and face structural economic unviability.
Specific pledge: PROPOSAL "Within 90 days of swearing-in, Dr. Aravind will initiate three protective Assembly actions: (1) A Written Question on MGNREGS wage arrears in Orathanadu block — how many SC agricultural labour families are owed pending wages? (2) A motion demanding a women's specialist day at Orathanadu PHC once monthly — a gynaecologist from Thanjavur Medical College visits Orathanadu taluk, not the other way around. (3) A Private Member motion on agricultural mechanisation employment compensation for displaced paddy harvest labour."
Measurable metric: MODEL Every RTI filed and every Assembly Question tabled is publicly verifiable on the TN Assembly website. Dr. Aravind's accountability scorecard will be public record from Day 1 of his tenure.
INFERENCE PHC specialist vacancies are a documented, statewide issue in TN rural health infrastructure. Orathanadu block's rural population (93% of 276,272 = ~257,000 people) currently depends on a PHC with likely no resident specialist. Agricultural workers face specific occupational health conditions — pesticide exposure, back injuries from paddy transplanting, heat stress — that generic PHC care does not address. Dr. Aravind is the only candidate in the field qualified to understand and resolve this gap personally.
PROPOSAL As MLA, Dr. Aravind will: (a) Table an Assembly Written Question in Week 1 demanding the total number of specialist vacancies at Orathanadu block PHC and the time each vacancy has been pending, (b) Table a petition for one monthly Specialist Outreach Day at Orathanadu PHC — a rotation of Thanjavur Medical College specialists visiting the block, not the reverse, (c) Personally initiate a quarterly Agricultural Workers' Occupational Health Camp in partnership with TNAU Thanjavur — specifically diagnosing and treating paddy farmer health conditions. Dr. Aravind will personally conduct these camps as a qualified physician.
FACT The Cauvery delta's eri (tank) system is the secondary irrigation backbone for paddy cultivation — when Cauvery canal water is insufficient, tanks buffer the crop. Thanjavur district has hundreds of eris, many of which have become severely silted reducing water retention capacity. MGNREGS convergence with eri desilting is a standard state government mechanism. Whether Vaithilingam directed his MLACDS and MGNREGS influence toward eri desilting in Orathanadu block is the campaign's key RTI question. (Source: Chengalpattu/Thanjavur NIC; MGNREGS convergence is documented TN Agriculture policy.)
PROPOSAL Dr. Aravind will: (a) Name the 5 most critically silted eris in Orathanadu taluk in his campaign manifesto (to be confirmed by TNAU extension officer or Revenue Department survey — specific eri names to be inserted post-RTI data receipt), (b) Table a Private Member Motion in Session 1 directing the TN PWD to complete a siltation audit of all eris in Orathanadu block within 6 months, (c) Direct MLACDS funds toward named eri desilting in Year 1 — with public progress reporting quarterly on his MLA website.
INFERENCE Cauvery delta farmers experience two recurring accountability failures: (a) PM Fasal Bima Yojana crop insurance claims are processed with documented delays — farmers who filed claims in Orathanadu block may not have received compensation even for documented crop losses; (b) Cauvery water allocation to Orathanadu block under the delta canal system is documented by PWD but rarely communicated transparently to farmers — decisions about water priority that directly impact planting schedules are opaque. Both are within MLA-influenceable accountability scope.
PROPOSAL As MLA, Dr. Aravind will table: (a) An Assembly Question demanding the number of pending PMFBY crop insurance claims from Orathanadu taluk by crop season, their average processing age, and the total amount owed to farmers in the constituency, (b) A motion demanding that the TN PWD publish a monthly Cauvery water allocation bulletin specifically for Orathanadu block irrigation — making canal water distribution schedule publicly available to all registered farmers, (c) An Assembly Petition requesting the establishment of a Farmer Helpdesk at Orathanadu taluk office for crop insurance claim tracking — zero cost, existing government staffing, immediate farmer benefit.
| REF | SOURCE | TYPE | DATE | CONF | URL | SECTIONS |
|---|---|---|---|---|---|---|
| S1 | Oneindia — Orathanadu AC175 2026 constituency page | News (ECI-derived) | Mar-Apr 2026 | MID | oneindia.com/orathanadu-assembly-elections-tn-175/ | S00, S01, S02, S09 |
| S2 | IndiastatPublications — Orathanadu Assembly Factbook 2024 | Secondary (ECI-derived) | 2024 | MID | indiastatpublications.com/assembly_factbook/tamil_nadu/thanjavur/orathanadu | S02 (electorate, SC%, rural%, polling stations) |
| S3 | ADR/ECI Official Press Release — TN 2021 Vote Share and Margin Analysis (PDF) | ECI Official | Jun 2021 | HIGH | adrindia.org — Analysis_of_Vote_Share_and_Margin_TN2021_English.pdf · Row 117: Orathanadu data | S01, S02, S09 — primary vote data source |
| S4 | The South First — "OPS loyalist R Vaithilingam joins DMK" | News | 21 Jan 2026 | HIGH | thesouthfirst.com/tamilnadu/ops-loyalist-r-vaithilingam-joins-dmk/ | S01, S02, S03, S04 (defection confirmed) |
| S5 | The Statesman — "DMK announces 164 candidates; OPS from Bodinayakanur" | News | 28 Mar 2026 | HIGH | thestatesman.com — DMK candidate list article | S02 (Vaithilingam as 2026 DMK Orathanadu candidate) |
| S6 | Wikipedia — 2026 Tamil Nadu Legislative Assembly election | Secondary | Apr 2026 | HIGH — cross-verified with S4/S5 | en.wikipedia.org/wiki/2026_Tamil_Nadu_Legislative_Assembly_election | S02 (defection timeline, Vaithilingam Jan 2026 join DMK) |
| S7 | resultuniversity.com — Orathanadu AC historical results citing ECI | Secondary/ECI-derived | Various | MID | resultuniversity.com/election/orathanadu-tamil-nadu-assembly-constituency | S02 (2016 result: DMK 84,378 vs AIADMK 80,733, margin 3,645) |
| S8 | Thanjavur District — Economy and Agriculture (Chengalpattu/Thanjavur NIC) | Government | 2024 | HIGH | thanjavur.nic.in | S02 (economic character, Cauvery delta, paddy cultivation) |
| S9 | The Week — "DMK's candidates for TN assembly polls — OPS from Bodinayakkanur" | News | 28 Mar 2026 | HIGH | theweek.in — DMK candidate list article | S02 (Vaithilingam DMK candidacy confirmation) |
| S10 | News9Live — "OPS Faction Crumbles: Ex-AIADMK minister Vaithilingam joins DMK" | News | 21 Jan 2026 | HIGH | news9live.com — Vaithilingam joins DMK article | S03, S04 (ministerial career, defection circumstances) |
| S11 | TVK Official Candidate List 29 Mar 2026 (user-provided) | Party Official | 29 Mar 2026 | MID — user-provided, verify at ECI affidavit portal | User-provided; cross-check at voterlist.co.in/tvk-candidate-list | S02 (Dr. K Aravind TVK candidacy) |
| S12 | ECI Delimitation Order 2008 — AC175 boundary definition | ECI Official | 2008 | HIGH | ECI Delimitation Commission Order No. 52 | S00 (AC number, PC30 Thanjavur mapping) |
| DATA POINT | STATUS | CONF | NOTES |
|---|---|---|---|
| Orathanadu AC number: AC175 | VERIFIED | HIGH | ECI Delimitation Order 2008; consistent across all sources. |
| 2021 Winner: Vaithilingam R (AIADMK), 90,063 votes, 46.95% | VERIFIED | HIGH | ADR/ECI Official Press Release, Row 117 (Ref-S3). |
| 2021 Runner-up: Ramchandran M (DMK), 61,228 votes, 31.92% | VERIFIED | HIGH | ADR/ECI Official Press Release (Ref-S3). |
| 2021 Total valid votes: 191,840; Margin: 28,835 (15.03%); NOTA: 867 (0.45%) | VERIFIED | HIGH | ADR/ECI Official Press Release, Row 117 (Ref-S3). Cross-verified with Oneindia (Ref-S1). |
| 2021 Electorate: 243,747; Polling stations: 340 | VERIFIED | HIGH | IndiastatPublications citing ECI voter list (Ref-S2). |
| 2021 Turnout: 78.24% vs 79.03% | CONFLICT | MID | [CONFLICT] Oneindia: 78.24% | IndiastatPub: 79.03%. This report uses 78.24%. Verify at eci.gov.in. |
| 2016 Result: DMK Ramchandran M won, 84,378 votes, margin 3,645 over Vaithilingam R (AIADMK) | VERIFIED | HIGH | resultuniversity.com citing ECI (Ref-S7). Confirmed: same two candidates, reversed outcome 2016→2021. |
| AIADMK won 6 times, DMK 4 times since 1977 | VERIFIED | HIGH | Oneindia (Ref-S1) citing ECI historical data. |
| Vaithilingam resigned MLA seat and joined DMK on 21 January 2026 | VERIFIED | HIGH | South First (Ref-S4), News9Live (Ref-S10), Wikipedia (Ref-S6). Three independent sources confirm date and circumstances. |
| DMK nominated Vaithilingam as 2026 Orathanadu candidate | VERIFIED | HIGH | The Statesman (Ref-S5), The Week (Ref-S9), Wikipedia (Ref-S6). Official DMK candidate list dated 28 Mar 2026. |
| TVK candidate: Dr. K Aravind | USER-PROVIDED | MID | Provided by user. Not independently confirmed in English-language sources searched. Verify at affidavit.eci.gov.in post-nomination. |
| AIADMK 2026 candidate for AC175 | INSUFFICIENT | INSUF | Vaithilingam's defection means AIADMK needs a new candidate. Name not confirmed. Verify at AIADMK official 2026 list. |
| NTK and MNM exact vote counts in 2021 for AC175 | INSUFFICIENT | INSUF | Only totals for VCK and DMK retrieved from ADR ECI press release. Third-space ~39,682 is a residual estimate. Verify at ECI TN 2021 Statistical Report for AC175. |
| Vaithilingam's 2021 affidavit: criminal cases, assets, liabilities | INSUFFICIENT | INSUF | Not retrieved in searched sources. Verify at myneta.info or affidavit.eci.gov.in. Critical for governance attack brief. |
| MLACDS utilisation 2021-2026 for Orathanadu AC175 | INSUFFICIENT | INSUF | RTI application required. This is the campaign's most important intelligence gap. |
| Dr. K Aravind's medical qualifications (MBBS/MD/specialisation) | INSUFFICIENT | INSUF | User-provided candidacy only. Medical qualification type, specialisation, and year of graduation not in available sources. Must be confirmed from ECI affidavit and used prominently in all campaign materials. |
| All pledge cost estimates | MODELLED | MODEL | All costs labelled [MODEL]. Legislative actions (Assembly Questions, Motions, RTIs) carry zero budget cost. Infrastructure estimates require formal DPR. |
| Vote simulation outputs | MODELLED | MODEL | 2021 ECI baseline. The DMK slider represents Vaithilingam's combined personal + party vote — a model assumption, not observed data. Formula disclosed. Not a prediction. |