The death of Supreme Court Justice Ruth Bader Ginsburg gives Republicans the chance to do the right thing. For a president up for reelection in just six weeks, the right thing to do would be to hold off. It’s widely assumed that the president will soon announce a nominee and urge quick Senate action. But if Trump and his advisers are focused on his reelection, the shrewd choice would be to do the opposite. What would he gain from this option? First, he would avoid a ferocious battle in the Senate that would most likely jeopardize several incumbent Republicans. Second,...