“Why shouldn't two new Justices be appointed each administration? A re-elected President would then have four opportunities to appoint. At the beginning of each administration, the two oldest Justices would automatically hand in their resignations, to take effect at the President's convenience. Thus new blood would be infused into the Court at regular intervals without rancour, and the Court would normally be renewed every 16 years ... Whenever death or retirement occurred, the President would have an extra appointment.”