 In 1998–99, Asghar Khan made unsuccessful attempts to merge his party's cause to Imran Khan's PTI.In 2002, he handed over his small party to his elder son, Omar Asghar Khan, who was a cabinet minister in the early Musharraf administration.After his son's death in 2002, Khan joined the National Democratic Party in 2004, which he remained part of until 2011.