All India Samathuva Makkal Katchi

The All India Samathuva Makkal Katchi (abbr. AISMK) was an Indian regional political party in the state of Tamil Nadu. It was founded by the former member of parliament of the Republic of India R. Sarath Kumar on 31 August 2007. The party was led by Sarath Kumar as president until 12 March 2024 from its date of founding. On 12 March 2024, the AISMK was merged into the Bharatiya Janata Party by its founder Sarath Kumar, and presided over by K. Annamalai, the state president of the Tamil Nadu BJP.

R. Sarath Kumar era (2007–24)
The party was founded on 31 August 2007 by R. Sarath Kumar, a veteran Tamil film star and politician. In the 2011 Tamil Nadu Legislative Assembly election, the party became part of the AIADMK-led Alliance, which included the left and actor-turned-politician Vijayakant's Desiya Murpokku Dravida Kazhagam (DMDK). In that alliance, the AISMK contested the candidature of R. Sarath Kumar in Tenkasi and Ernavoor A. Narayanan in Nanguneri in the two leaves symbol as the AIADMK candidate and won both the seats. Also the alliance swept the polls by winning 203 seats. AIADMK general secretary J. Jayalalithaa was sworn in as chief minister of Tamil Nadu for the fourth time.

In the 2016 Tamil Nadu Legislative Assembly election, the party continued the alliance, and in that alliance, the AISMK contested the candidature of R. Sarath Kumar in Tiruchendur in the two leaves symbol as the AIADMK candidate and lost to DMK candidate Anitha R. Radhakrishnan by a margin of 26,001 votes.

In November 2017, Sarath Kumar said in an interview for The Hindu: "For the last 10 years, I have been closely associated with AIADMK. In fact, I have even been identified as the party's propaganda secretary. Though I don't regret this identification, my party couldn't grow. Now, I want to focus on my party and be seen as a possible chief minister candidate.".

In the 2021 Tamil Nadu Legislative Assembly election, the party aligned with Makkal Needhi Maiam (MNM), and in that alliance, the AISMK contested 33 seats in the torch light symbol as the MNM candidate and lost in every seat contested.

Dissolution
On 12 March 2024, the All India Samathuva Makkal Katchi was merged into the Bharatiya Janata Party by its founder Sarath Kumar, and presided over by K. Annamalai, the president of the Tamil Nadu BJP in Chennai.