[citation needed] The formation of the INPT was pushed through after pressure from the underground National Liberation Front of Tripura, who wanted to unite all tribal nationalist forces in a single party.

[citation needed] As IPFT had a majority in the Tripura Tribal Areas Autonomous District Council, INPT came to govern that institution until 2003.

NSPT were able to, with support from the Communist Party of India (Marxist) (CPI(M)) members in TTAADC, to win a majority in the assembly and INPT formed the opposition.

[citation needed] In the state assembly elections in 2003 INPT was allied with the Indian National Congress.

[citation needed] Ahead of the Lok Sabha elections in 2004 INPT joined the Bharatiya Janata Party (BJP)-led National Democratic Alliance.