Asom Sonmilito Morcha

Ten political parties formed a political alliance in the run-up to the 2021 Assam Legislative Assembly election. But only eight of them including Indian National Congress, All India United Democratic Front, Bodoland People's Front, Communist Party of India (Marxist), Communist Party of India, Communist Party of India (Marxist–Leninist) Liberation, Anchalik Gana Morcha and Rashtriya Janata Dal agreed on a seat-sharing arrangement for dethroning the incumbent BJP government.^[9] The alliance was unable to defeat the BJP and its allies, but it gained 43.68% of the total votes polled and got 50 seats.^[10]

After the election, Bodoland People's Front left the alliance and All India United Democratic Front was expelled by Indian National Congress.^[11]

Due to disagreement on seat sharing for Assam Legislative Assembly by-polls in 2024, the opposition parties went ahead, excluding the Indian National Congress.^[12]

In November 2025, Indian National Congress and seven other parties formed a new alliance ahead of the 2026 Assam election.^[13]

Later on, ahead of 2026 Assam Legislative Assembly election, Raijor Dal left the alliance.^[14] However, Raijor Dal rejoined the alliance later and the seat sharing was finalised the same day.^[15][16] On the other hand, Communist Party of India (CPI) decided to contest alone in the polls without entering into any formal alliance but the party says it will extend its full support to the alliance without formally joining it.^[17]

• Secular Democratic Front