When President Barack Obama turned over his news conference to President Clinton like a tag-team wrestler and left the room to attend a Christmas party -- leaving Clinton to take questions from reporters about Obama's tax-cut deal -- he gave the astonished chattering classes plenty to chatter about: "Obama's Stunt-Double Presidency," read an Investor's Business Daily headline. "A Third Clinton Term?" asked a Washington Post headline. "Clinton Refuses to Leave White House!" joked the disturbingly believable humorist Andy Borowitz.