ISLAMABAD: Pakistan Tehreek-e-Insaf (PTI) Chairman Imran Khan has said that his party has key role in national politics vowing to continue his struggle for establishing Pakistan of Quaid-e-Azam and Allama Iqbal. In his message on 21st Yaum-e-Tasees of PTI, he said that PTI not only created awareness about politics but also gave boost to nation against corruption of leaders. The movement that started 21 years ago has become a strong voice of Pakistan, Khan added. He said that successful movement of Panama has laid foundation stone of stable Pakistan and this is the reason Prime Minister Nawaz Sharif is responding to corruption allegations.