Former Chief Minister Nitish Kumar released a video message appealing to Bankipur voters to support NDA candidate Neeraj Kumar Sinha.
Jan Suraaj founder Prashant Kishor is treating the Patna byelection as a referendum on Bihar's BJP-led administration.
The BJP fielded youth leader Neeraj Kumar Sinha after their initial nominee Abhishek Kumar Bunty withdrew from the contest.

