Asked about confidence the U.S.-Iran memorandum of understanding, earlier
reported due to be signed on Friday, would be finalized, Trump said he believes
Iranian leaders want to sign but acknowledged you can never be 100% certain.
"You'll know soon... I think they'll sign. They want to sign; they want to get
back to normal life," he said. He called the deal "a very strong agreement,"
saying it is long and detailed and will be turned into a formal contract. "If
they don't sign, we'll have to restart the whole process," he added.