Imran Khan, former prime minister and head of the opposition Pakistan Tehreek-e-Insaf party, campaigns in Karachi for parliamentary by-elections on October 16.  EPA
Imran Khan, former prime minister and head of the opposition Pakistan Tehreek-e-Insaf party, campaigns in Karachi for parliamentary by-elections on October 16. EPA

Imran Khan makes Pakistan by-elections a 'referendum' by contesting seven seats