The Republicans' ideal Supreme Court nominee is someone who might overturn Roe v. Wade, but won't. That makes President Bush's choice of John G. Roberts pure genius. If defenders of abortion rights condemn the pick, so much the better. Social conservatives will think they won. And when a court ruling later proves they haven't, Republican leaders can comfort them. So far, all is according to plan. Roe v. Wade is the 1973 Supreme Court decision enshrining a federal right to abortion. If Roe went down, two bad things would happen to Republicans. One is that it would arouse America's pro-choice...