Pakistan Tehreek-e-Insaf (PTI) Chairman Imran Khan said on Saturday that President Asif Ali Zardari and opposition leader Nawaz Sharif were de facto brothers, and were collectively looting the national wealth. Talking to a party delegation here, the cricket legend-turned politician alluded that Zardari and Nawaz were “travelling in Samjota Express train” and were supporting each other in corruption. Khan said the PTI was an institution meant for the people, not for family members. He said that even a common youngster could become a PTI leader through impartial intra-party polls. He said Prime Minister Raja Pervez Ashraf was providing protection to the president to conceal his corruption. He said the PTI would bowl out anti-state political parties in the upcoming general elections, He said the PTI would contest against all major political players without entering into an alliance with any other party.