Qatar’s ruler has appointed a new prime minister, the office of Emir Sheikh Tamim bin Hamad Al Thani said on Tuesday, choosing a close associate for an influential role that seeks to ensure the emir’s writ runs throughout the Gulf State’s administration. Sheikh Khalid bin Khalifa bin Abdelaziz Al Thani will take on the role of prime minister after Sheikh Abdullah bin Nasser Al Thani, who was also Qatar’s interior ...