All India Trinamool Congress, formerly West Bengal Trinamool Congress, (WBTC), is a political party in India led by Mamata Banerjee. Founded in 1998, it consisted largely of defectors from the (then) electorally unsuccessful Indian National Congress in Bengal.
In the Lok Sabha elections in 1999 AITC got 2.6% of votes and eight seats, the Communist Party of India (Marxist) retaining control of most of the remaining seats in the State Assembly. However the Trinamool Congress managed to win control of Calcutta in municipal elections in 2000, only to lose it again to the CPI (M) in June 2005.
Ahead of the 2004 Lok Sabha elections P.A. Sangma's break-away fraction of the Nationalist Congress Party merged into the party.
In October 2007, Trinamool Congress called upon for 12-hour shutdown protesting against what it termed as state sponsored terrorism in Nandigram and on several other issues.
