RAWALPINDI: As the Pakistan Tehreek-e-Insaf (PTI) prepares for a major rally next week, senior party leader Asad Qaiser announced on Thursday that imprisoned party founder Imran Khan has approved the formation of a “grand opposition alliance” by expanding the Tehreek Tahafuz-e-Ayin-e-Pakistan (TTAP) platform. “PTI decides to expand the opposition alliance in meeting with Imran Khan,” said Qaiser, a former National …