Republicans are kidding themselves if they believe Mitt Romney, at least his current iteration, can win the election merely by attacking Barack Obama. Given Romney’s lack of conservative principles, perhaps that is for the best. Who is Mitt Romney? What does he believe? Where are his core principles? There is no need to seek penitence if you don’t know the answer to the preceding questions. After all, no one could provide a consistent answer. Romney was for gun control before he was the NRA’s proudest supporter, for health care reform before he championed the repeal of Romneycare (excuse me, Obamacare),...