After landslide victory of SP candidate Dimple Yadav in Mainpuri Lok Sabha bypolls, Shivpal Yadav led Pragatisheel Samajwadi Party-Lohia headed for a formal merger with Samajwadi Party led by Akhilesh Yadav. On Thursday, Akhilesh presented the SP flag to Shivpal at a press conference. Later Shivpal Yadav updated his Twitter profile introducing himself as SP leader and had no mention of PSPL.