Tehreek-e-Insaaf (PTI) chairman Imran Khan said that President Asif Ali Zardari is responsible for the memogate issue, report said on Wednesday. He was talking to the media at Lahore airport. When asked about his meeting with US Ambassador Cameron Munter along with ISI chief Shuja Pasha, Khan said that he will go to the court against the UK newspaper that claimed about his secret meeting. While commenting about PML-N, the PTI chief said that the party is the product of secret agencies and that PML-N and PPP are afraid of PTI.