Jan Suraaj Party founder Prashant Kishor on Friday claimed that migrants from Bihar, who returned home for Chhath festivities and have not yet gone back to their places of work, are the “X factor” in the assembly polls.

The former political strategist, whose fledgling party is said to have caught the imagination of “pravasis”, according to various surveys and opinion polls, made the claim a day after the first phase of voting registered a record 64.66 per cent turnout.