If the Obama administration believes that the ban on chemical weapons really is an international norm in danger of erosion and that the threat of a military strike is the way to shore it up, it needs to build some support among Congress, the U.N. Security Council, NATO, the European Union, the Arab League or other such groups. Recall that the Bush administration in the run-up to Iraq got congressional authorization; as its basis for action, it could point to 16 U.N. Security Council resolutions that Iraq had broken. After the invasion, 38 countries sent troops. It is ironic that Washington’s sole goal is to uphold an international norm, but it faces opposition from most countries and international public opinion. The negotiations do buy time for Syria, but also for the Obama administration.

