As President Donald Trump huddled with his top advisers in the White House Situation Room on Tuesday, U.S. officials signaled that the next 24 to 48 hours would be critical in determining whether a diplomatic solution with Iran is possible -- or if the president might resort to military action instead.

The U.S. won’t kill Iran’s Khamenei ‘at least for now,’ the president says, as confrontation over the nuclear program escalates.