What went wrong for Mamata Banerjee as trends show her party losing to BJP in WB?

A key factor behind CM Mamata Banerjee's TMC losing ground in West Bengal is BJP's gains in Muslim-dominated seats. TMC, which has traditionally relied on a consolidated Muslim vote, is losing ground in around nine such seats. A reason behind this is the crowded field of parties competing for Muslim votes. Parties like Congress entered the fray and diverted voters.