Islamabad (Monitoring Desk) PTI Chairman Imran Khan called Chaudhry Nisar Ali Khan on a telephone and asked him to join him. Imran Khan said that Chaudhry Nisar must quit PMLN now and announce to join PTI. According to media reports, Chaudhry Nisar thanked Imran Khan and assured that he will consider his offer if he (Nisar) quits PMLN.