Republicans already counting the seats they will pick up this fall should keep in mind Obama has a big card yet to play.
Should the president declare he has gone the last mile for a negotiated end to Iran’s nuclear program and impose the “crippling” sanctions he promised in 2008, America would be on an escalator to confrontation that could lead straight to war.
And should war come, that would be the end of GOP dreams of adding three-dozen seats in the House and half a dozen in the Senate.