The ISIS intervention may defy limits---and some in Congress don't believe it should have any.

Before it Americanizes the conflict, the U.S. should take stock of escalating regional revulsion against the Islamic State.

If negotiations fail, sanctions are only the beginning of hostilities with Tehran—but Rand Paul and Barbara Boxer offer an alternative.

The Wisconsin governor might unite the right—if he overcomes a charisma deficit and uncertain foreign policy.

Republicans who resist the president's other policies are apt to give him a blank check against ISIS.

Courting realists and libertarians could give him an edge against other establishment types—if he's willing to try.