U.S. and Iranian negotiators were in Qatar on Tuesday as both sides were set to hold talks with mediators, after a surge of attacks in recent days over the Strait of Hormuz threatened to derail efforts to agree on a lasting peace deal. Steve Witkoff and Jared Kushner, two of President Donald Trump's closest advisers, will meet with the prime minister of the Persian Gulf state, Sheikh Mohammed bin Abdulrahman Al Thani, a U.S. official said.