Pakistan minister vows to quit in fresh blow to PM Sharif

By Asif ShahzadISLAMABAD (Reuters) - Pakistani Interior Minister Nisar Ali Khan said on Thursday he would quit his post once the Supreme Court has ruled on corruption accusations against Prime Minister Nawaz Sharif, whatever the verdict.The announcement by one of Sharif's longstanding political allies marks a fresh blow for the premier as he awaits a ruling, expected on Friday, that could disqualify him from office.Khan said he had clashed with members of Sharif's Pakistan Muslim League-Nawaz (P