The contrast could not have been greater between a pair of diplomatic breakthroughs and the intransigence of Congress. Appearing in the White House briefing room Friday afternoon, President Obama said he had just spoken with Iranian President Rouhani, everything was on track for the nuclear issue, and the U.N. Security Council had reached a resolution that would ban Syria’s chemical weapons. Who could have imagined that negotiating with the Iranians and the Russians would be a more fruitful experience than working with the U.S. Congress?