Secular Democratic Alliance[1][2] or Sanjukta Morcha is a political alliance formed ahead of the 2024 Indian general election in West Bengal by the Left Front and the Indian National Congress in opposition to the Trinamool Congress and the Bharatiya Janata Party in West Bengal.

After much dispute and secession of 2 far-left groups : SUCI(C) and CPI(ML)L, from the Left Front, both Congress and Communists formed an understanding basis of what they called "seat-sharing", strongly objecting to the use of the word "alliance".

Despite a spirited campaign, both the Left Front and the Indian National Congress drew a blank in the election with a considerable decrease in their respective vote shares.

[18] Afterwards, ahead of 2024 Indian general election, ISF decided to contest alone in the Lok Sabha polls due to some differences in seat sharing and marks the end of alliance with Left and Congress.

On 29 March 2024 hill-based Hamro Party president Ajoy Edwards joined hands with the alliance to take on both the BJP and the TMC in Darjeeling Lok Sabha polls.