Amma Makkal Munnetra Kazhagam
RK Nagar by-election
In December 2017, Dinakaran contested in RK Nagar by-election and won by a huge margin of 40,707 votes. He became the first independent candidate to win a bypoll in Tamil Nadu and this was the first time in 18 years that a ruling party in the state lost a by-election.
Formation
Before being imprisoned in the Central Prison in Bangalore, Sasikala appointed Edappadi K. Palanisamy as Chief Minister of Tamil Nadu. Palanisamy and other ministers removed her from the post and expelled her from the party in September 2017..On 21 August 2017, it was reported that the AIADMK faction loyal to Palaniswami had decided to merge with Panneerselvam's splinter faction and expelled Sasikala as the general secretary as one of the key demands of the merger. It was reported on 28 August that Sasikala had been expelled during a party meeting, but this was later denied.
Formation
On 13 September, the AIADMK General Council cancelled Sasikala's appointment as interim general secretary and expelled her from the party, though officials appointed to party posts by her were allowed to continue their duties. Instead, the late Jayalalithaa was named the eternal general secretary of AIADMK.