Unlike Mr. Trump, Mr. Cruz is ideologically and intellectually qualified to be president (and to pick Supreme Court nominees). Moreover, there are two things even Cruz haters can concede. First, it's a given that a President Cruz will want to be re-elected. Second, Mr. Cruz's "brand" hinges almost entirely on his fidelity to the Constitution. Mimicking Barack Obama's disdain for the Constitution simply wouldn't be an option for Mr. Cruz, and that means he'd have to work with Congress to get his conservative agenda passed.