TTV Dhinakaran, General Secretary of the Amma Makkal Munnetra Kazhagam (AMMK), expelled S Kamaraj, the party's lone Member of the Legislative Assembly (MLA) representing Mannargudi, for supporting Chief Minister C Joseph Vijay and the Tamilaga Vettri Kazhagam (TVK) government in the Tamil Nadu Assembly. Dhinakaran stated that Kamaraj acted independently and against the party's official stance. Kamaraj won his seat by defeating a DMK candidate by 1,566 votes, securing 68,416 votes in total.

The expulsion comes amid a controversy where Dhinakaran accused TVK of submitting a forged support letter allegedly written by Kamaraj. He challenged TVK to provide the original letter and video evidence to the Governor. In response, TVK released a video claiming that Kamaraj voluntarily wrote the support letter. The political landscape in Tamil Nadu is shifting as TVK, which holds 108 seats in the 234-member Assembly, seeks to gain support from smaller parties to achieve a majority of 118 seats. Dhinakaran emphasized AMMK's continued alignment with the NDA and AIADMK alliance, supporting AIADMK leader Edappadi K Palaniswami as the chief ministerial candidate.