MARDAN - Pakistan Tehreek-e-Insaf (PTI) Chairman Imran Khan on Friday said that he knows how to contest elections and that his all politics is only for Pakistan. He expressed these views while addressing a public rally at the railway ground in Mardan district and in a press conference at the resident of former police chief Fayaz Khan Toru here. Vice chairman Shah Mehmood Qureshi, provincial organizer Asad Qaiser, district organizer Atif Khan, former federal minister and ANP's estranged MNA Khwaja Muhammad Khan Hoti also addressed the public rally.