PTI Chairman Imran Khan in the past had invited Nisar to join the party on a number of occasions, but he never accepted or responded to his invitation.

Ghulam Sarwar, when contacted, said he had told Imran Khan that he can withdraw from the election race only if Nisar applies for the PTI ticket. Otherwise, Sarwar said he had told the PTI chief that he would file papers in every constituency from where Nisar files the nominations.

Ghulam Sarwar Khan, who defeated Chaudhry Nisar from Taxila constituency in the 2013 elections, said his party would "clean bowl" Nisar in the July 25 elections.

Nisar has submitted nomination papers as an independent candidate in four constituencies — two for NA and two for Punjab Assembly.