* Former premier challenges PTI chief to reveal who ordered him to vote for Zardari's candidate in Senate polls LONDON: Former premier Nawaz Sharif has challenged Pakistan Tehreek-e-Insaf (PTI) chief Imran Khan to explain who ordered him to vote for Asif Ali Zardari’s candidate in recent Senate elections and what were his motivations behind voting for PPP’s electoral symbol – arrow. Speaking to the media after holding talks with Prime Minister Shahid Khaqan Abbasi and former finance minister Ishaq Dar, Nawaz referred to Jamaat-e-Islami leader Sirajul Haq’s statement in which he said that Pervez Khattak had told him that the PTI was “ordered from the top” to vote for Sadiq Sanjrani and PPP’s Saleem Mandviwala for the Senate chairman and deputy chairman’s posts. The former premier said that by voting for the PPP, Imran Khan proved that he and other political parties has always been looking for “orders from the top”, while the PML-N is the only party that takes dictation ...