ISLAMABAD: Leaders of the Pakistan Tehreek-e-Insaf (PTI) launched a scathing attack on the ruling alliance on Saturday, raising serious questions about the recently concluded presidential election. The PTI leaders expressed their dissatisfaction following the defeat of their candidate, Mahmood Khan Achakzai, at the hands of the ruling coalition’s nominee, Asif Ali Zardari. Addressing the media outside the Parliament House, PTI Chairman Barrister …