In the month since President Trump made the surprise announcement that he would withdraw U.S. troops from Syria, the policy has slowly disintegrated into a mess. First, the snap decision cost him a Defense Secretary, Jim Mattis, who inspired bipartisan respect and trust. Second, anxious allies like Saudi Arabia and Israel urged the President to rethink a move that might strengthen the regime of Bashar Assad and its backers in Russia and Iran. Then on Jan.