Former Assam Congress president and Rajya Sabha member Ripun Bora resigned from the grand old party and joined the Trinamool Congress. In his letter of resignation, Bora, who has been associated with the Indian National Congress since 1976, pointed out infighting within the Congress party claiming that it paved way for Bharatiya Janata Party (BJP) to grow and also "demoralize" Congress workers. Instead of fighting against BJP, Bora said that he is "pained" to inform that a section of senior post leaders of Assam Congress have been maintaining a "secret understanding with BJP government mainly with the Chief Minister."

He alleged that the party's interest and ideology are being compromised in favour of the BJP for some vested interests of a few leaders. "During the past couple of years the way BJP, the symbol of communal and decisive forces is growing across the country and it is a serious threat to the democracy, constitution and secularism and economy of our country. But instead of fighting and unitedly and aggressively to prevent BJP at this critical juncture of the country," the letter reads.