AIADMK split erupts in Assembly as 25 of 47 MLAs back Vijay government in trust vote

During a trust vote in the Tamil Nadu Legislative Assembly on May 13, 2026, 25 of the AIADMK's 47 MLAs voted in favour of the ruling TVK-led government, defy...

What Happened

During a trust vote in the Tamil Nadu Legislative Assembly on May 13, 2026, 25 of the AIADMK's 47 MLAs voted in favour of the ruling TVK-led government, defying a party whip that had directed all AIADMK members to vote against the government.
The remaining 22 AIADMK MLAs voted against the government in line with the party direction. The ruling government secured 144 votes in total and comfortably won the floor test.
The AIADMK's central leadership expelled the 25 rebel MLAs and filed a petition before the Tamil Nadu Legislative Assembly Speaker seeking their disqualification under the Tenth Schedule of the Constitution (Anti-Defection Law).
Legal experts immediately flagged the constitutional complexity: while the rebels constitute a majority of the AIADMK's legislative party (25 of 47), the merger exemption under the Tenth Schedule requires more than a legislative majority — it requires a formal merger of the political party itself.
The Speaker's recognition of the legitimate whip-issuing authority within the AIADMK legislative party is now a critical threshold question that will determine whether the rebels face disqualification.

Static Topic Bridges

Anti-Defection Law — Tenth Schedule (52nd Constitutional Amendment, 1985)

The Anti-Defection Law is embodied in the Tenth Schedule of the Constitution, inserted by the Constitution (Fifty-Second Amendment) Act, 1985. It came into force on March 1, 1985, and was enacted to curb the rampant political defections that had destabilized legislative bodies since the 1967 general elections (nearly 50% of elected legislators had defected between 1967–1971). Under the Tenth Schedule, a member of a legislature is liable to be disqualified if they voluntarily give up membership of their political party, or vote (or abstain from voting) contrary to any direction issued by their political party without prior permission.

Constitutional basis: Tenth Schedule; inserted by 52nd Amendment Act, 1985; in force from March 1, 1985.
Grounds for disqualification: (1) Voluntarily giving up party membership; (2) Voting/abstaining contrary to party whip without permission.
Constitutional articles cross-referenced: Article 102(2) — disqualification for membership of Lok Sabha; Article 191(2) — disqualification for State Legislative Assembly membership.
Decision-making authority: The Speaker of the House (for the lower house and state assemblies); the Chairman of the upper house.
Judicial review: Speaker's decision is subject to judicial review — Supreme Court in Kihoto Hollohan v. Zachillhu (1992) struck down the bar on judicial review (Paragraph 7 of the Tenth Schedule) as unconstitutional; review lies under Articles 32 and 226.

Connection to this news: The 25 AIADMK MLAs voted against the party whip — the textbook trigger for disqualification under Paragraph 2(1)(b) of the Tenth Schedule. The Speaker's role in adjudicating the disqualification petition filed by the AIADMK central leadership is now constitutionally central.

The Merger Exemption — Paragraph 4 of the Tenth Schedule

A key exception to disqualification under the Tenth Schedule is the "merger" provision under Paragraph 4. A legislature member is protected from disqualification if their original political party merges with another political party, and at least two-thirds of the members of the legislature party agree to the merger. Critically, this provision has two sequential requirements: (1) the political party (as an organization) must decide to merge with another party, and (2) at least two-thirds of the legislature party must consent to that merger. Legislators cannot unilaterally "manufacture" a merger through numerical strength alone.

Merger exemption: Paragraph 4, Tenth Schedule.
Two-thirds threshold: At least 2/3 of the legislature party members must consent to the merger.
AIADMK numbers: 25 of 47 = 53.2% — exceeds 50% majority but falls short of the 2/3 (approximately 31 of 47) threshold needed.
The Supreme Court in Subhash Desai v. Principal Secretary, Governor of Maharashtra (2023) held that the "legislature party" and "political party" are distinct entities — a merger must originate in the political party organization, not just among its legislators.
The 91st Amendment Act, 2003 deleted the provision that exempted splits within a party (old Paragraph 3), leaving merger as the only numerical exception.

Connection to this news: With only 25 of 47 MLAs (53%) backing the rebels — well short of the 31 required for a two-thirds majority — the rebels cannot claim the merger exemption even on numerical grounds. Furthermore, since no formal merger of the AIADMK political party with another party has occurred, the constitutional threshold for the merger defence is doubly unmet.

Speaker's Role and Judicial Review in Anti-Defection Proceedings

The Speaker of the State Legislative Assembly is the designated authority to hear and decide disqualification petitions under the Tenth Schedule. This role makes the Speaker simultaneously the presiding officer of the House and a quasi-judicial authority in defection cases — a constitutionally anomalous position frequently criticized for its susceptibility to partisan influence. Following Kihoto Hollohan (1992), the Speaker's decisions are subject to judicial review but courts generally refrain from interfering until a final decision is made, except in cases of breach of natural justice or constitutional excess.

Kihoto Hollohan v. Zachillhu (1992): Supreme Court upheld constitutionality of Tenth Schedule; struck down Paragraph 7 (bar on judicial review) as requiring ratification by states (it was a constitutional amendment requiring special majority + state ratification but lacked the latter).
Courts may intervene before final Speaker decision only in exceptional circumstances.
The Speaker must first determine which faction holds the legitimate "legislature party" status — a threshold question that affects whose whip is operative.
The 91st Amendment, 2003: Deleted the old "one-third split" exemption under Paragraph 3; merged parties exemption (Paragraph 4) retained.

Connection to this news: The Tamil Nadu Speaker's first task is to determine whether the whip issued by the AIADMK central leadership (Edappadi K. Palaniswami faction) was the operative whip binding on the rebel MLAs. That recognition question will determine the entire trajectory of the disqualification proceedings.

Key Facts & Data

AIADMK total MLAs in Tamil Nadu Assembly: 47.
Rebels voting for government: 25 (53.2% of AIADMK legislative party).
AIADMK MLAs following party whip: 22.
Two-thirds threshold for merger exemption: ~31 of 47 MLAs (rebels fall short).
Trust vote outcome: Ruling government won with 144 votes total.
Anti-Defection Law: Tenth Schedule, Constitution (Fifty-Second Amendment) Act, 1985; in force March 1, 1985.
Disqualification trigger: Voting against party whip without prior permission — Paragraph 2(1)(b), Tenth Schedule.
Merger exemption: Paragraph 4, Tenth Schedule — requires (a) political party merger + (b) 2/3 of legislature party consent.
Key case: Kihoto Hollohan v. Zachillhu (1992) — upheld Tenth Schedule; Speaker's decisions subject to judicial review under Articles 32 and 226.
Key case: Subhash Desai v. Principal Secretary, Governor of Maharashtra (2023) — political party and legislature party are distinct entities.
91st Amendment Act, 2003: Deleted old one-third split exemption; only merger exemption remains.
Constitutional cross-reference: Article 102(2) and Article 191(2) — disqualification from parliamentary/state assembly membership.