The All India Trinamool Congress is an Indian political party based in West Bengal and is lead by its founder and chief minister of West Bengal Mamata Banerjee. The party was founded on 1st January 1998 as a breakaway faction of the Indian National Congress. Before forming her own party, Mamata Banerjee was a member of Indian National Congress for 12 years. The AITC was registered with the Election Commission of India in mid-December 1999 and on 2nd September 2016 it was recognized as a national party.
In December 2006, the general population of Nandigram was given notices by Haldia Development Authority that a significant portion of Nandigram would be seized and 70,000 people would be expelled from their homes. Driven by the All India Trinamool Congress, people began protests against the land acquisition and consequently the Bhumi Uchchhed Pratirodh Committee (BUPC) was framed for land acquisition and forced eviction. On 14th March 2007 the police open fired and executed 14 villagers with many more reported missing. Many sources guaranteed that armed CPM workers alongside police, fired on dissenters in Nandigram which was also supported by CBI in its report. Countless protested in the city and this occurrence brought forth another movement driven by SUCI(C) leader Nanda Patra (a teacher of Tamluk).
In the 1998 Lok Sabha elections, the TMC won 8 seats and in the following Lok Sabha elections held in 1999, the party won 8 seats with the BJP, expanding its total by one. In 2000, the TMC won the Kolkata Municipal Corporation Elections and later in the 2001 Vidhan Sabha elections, the TMC won 60 seats with Congress. With the BJP, TMC won 1 seat in the 2004 general elections and 30 seats in the 2006 Vidhan Sabha elections.
In the 2009 LokSabha election, the Trinamool Congress won 19 seats in West Bengal and in the 2010 Kolkata municipal election, the party won 97 out of 141 seats, also winning a majority of other municipalities. In the 2011 West Bengal Legislative Assembly elections, the Trinamool Congress-led coalition that included the INC and SUCI(C) won 227 seats in the 294-seats assembly where Trinamool Congress alone won 184 seats, empowering the party to represent itself without a coalition. Later, it won a by-election in Basirhat and two Congress MLAs joined TMC, giving it a total of 187 seats.
After winning majority seats in 2011,Mamata Banerjee was made the Chief Minister of West Bengal. On 18 September 2012, Mamata Banerjee announced her decision to pull back support to the UPA after the TMC’s requests to fix government-established changes incorporating FDI in retail, increment in the cost of diesel and restricting the quantity of subsidized cooking gas for family units, were not met.TMC held its majority and won 211 seats (out of 294) in the 2016 West Bengal Legislative Assembly elections.