New Delhi:In a big political upset in Bihar, the fledgling Jan Suraaj Party of Prashant Kishor scored a big win in the Bankipur assembly byelection. Kishor defeated the Bharatiya Janata Party (BJP) in its traditional bastion by a margin of 19,324 votes. This time Prashant Kishor won the seat vacated by BJP national president Nitin Nabin. The big question is not that Prashant Kishor won from Bankipur. This victory will open a new path for PK in Bihar politics and create fresh trouble for Chief Minister Samrat Chaudhary.