How strange to allow a President "the authority to pardon." Most Hamilton-ish ideas involve a "checks and balances" approach: if the President uses a veto, the legislative branch can override the veto, and if the President challenges an existing law, the Supreme Court can decide that the challenge is without merit. But no one looks over the President's shoulder as he issues a pardon. Like a King, he can just wave his wand and delete the past. The theory was that the President could use the pardon to display selflessness and magnanimity; in shielding decent people from some of the harshness of "the law," the President would inspire normal Americans to consider acts of mercy. But that's not really how the pardon has worked. Often, the pardon has had a political and self-serving function. For example, when Harding pardoned Eugene Debs, the gesture was not about deep feelings for Debs's plight. Harding didn't want Debs to become a martyr by dy...