In Assam and Bengal, Congress is standing on a very narrow Muslim base
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The Congress won 21 of the 390 seats it contested in Assam and West Bengal. Of the 21 winners, 20 are Muslims. The party, which attacks the BJP as communal, is getting caught in its own trap. And the warning came from within Congress way back in 2014.

This article gives an idea how the votebank and the geopolitics works in the subcontinent.