We understand that Mr. Scalia was a giant to his fellow political conservatives. Even those of us who disagreed with him nearly all the time recognize his intellect and the scope of his contributions — for good or ill — to American jurisprudence. And yes, his replacement could tilt the nation's highest court in a substantially different direction and away from the 5-4 conservative majorities of the past. But that's a reason, perhaps, to vote against a particular nominee, not to decide that a sitting president should be stripped of his authority to nominate anyone — which is essentially what Republicans are attempting to do. Mr. Scalia, who advocated for "originalism" in the court's interpretations of the constitution whether it suited his politics or not, might even be appalled by that.