As many as 25 leaders of the PML-N party and the Pakistan Muslim League-Quaid-i-Azam, including two former members of the Punjab Assembly, have joined the Pakistan Tehreek-e-Insaf. On Tuesday, former governing party member of the Punjab Assembly Khalid Pervez Virk and his counterpart, Irfan Bashir Gujjar, from the League-Quaid-e-Azam, met Punjab Tehreek-e-Insaf organiser Chaudhry Muhammad Sarwar at the chairman secretariat.