[3] Nonetheless, as the government fell in September with Congress poaching off coalition partners, Das switched sides to become the Minister of Excise and Agriculture under the premiership of Gopinath Bordoloi.
[3] In 1939, with Congress governments resigning from across India in protest against United Kingdom's unilateral decision to enroll Indian forces in the World War II, Assam United Party — an amalgamation of Muslim League with all shades of parties opposed to Congress — formed a successful coalition under Saadulah; however, Das was left out from the cabinet.
[3] In March 1945, Congress came into an understanding with the League and formed an unprecedented coalition government with virtually no opposition; Das was brought back to the ministry and assigned the portfolios of Industries and Cooperative Development.
[7][8] In Pakistan, he became the President of East Bengal Scheduled Castes Federation in the aftermath of Jogendra Nath Mandal's departure to India (1950) and gained significant political mileage.
[4] Feroz Khan Noon (Republican Party) formed the next government in December, 1957 and had Das appointed as the Minister of State for Finance.