President Obama vowed to double down on his use of executive action Tuesday, a move that some constitutional experts say spurns the intent of the Founding Fathers to govern by consensus, however difficult. Facing litigation from House Republicans over his repeated use of executive orders to bypass Congress, Mr. Obama nevertheless urged his Cabinet members to “be creative” in looking for more ways for him to exercise his presidential power unilaterally. “If Congress can’t act on core issues that would actually make a difference in helping middle-class families get ahead, then we’re going to have to be creative about how...