Pakistan's ruling party vows smooth transition ahead of vote on interim PM

By Drazen JorgicISLAMABAD (Reuters) - Pakistan's president has called a special parliamentary session on Tuesday to hold a vote to install Shahid Khaqan Abbasi as interim prime minister, with the ruling party vowing a smooth transfer of power after Prime Minister Nawaz Sharif was ousted.Mamnoon Hussain announced his decision to summon parliament late on Saturday after Sharif put forward his staunch ally Abbasi as interim leader and his brother Shahbaz, 65, as long-term successor.Nawaz Sharif's P