The three countries that worked with the Trump administration on the Gaza ceasefire deal want U.S.-Iran negotiations to prevent a regional war. White House officials say Trump hasn't made a final decision on a strike against Iran and remains open to a diplomatic solution. U.S. officials say President Trump's recent comments about negotiations aren't a bluff, but the U.S. doesn't know if Supreme Leader Ayatollah Ali Khamenei will authorize his diplomats to cut a deal that will be acceptable to the U.S.