WASHINGTON/RIYADH: President Donald Trump has told senior advisers in recent days that he may hold off on attacking Iran if the US faces no new provocations from Tehran or the Iran-backed Houthis in Yemen, according to three people familiar with the matter. Trump has alternated between threats of escalating the war with new strikes and winding down hostilities, and current and former officials say he does not appear to have made up his mind about how to resolve the unpopular…