Lame duck presidents don't usually get up to their necks in the campaigns to replace them, but George W. Bush is not just any lame duck. He has dismally low popularity ratings, and this election is shaping up as a referendum on his policies and, in particular, the War in Iraq. If Bush wants to avoid being remembered as the worst president in history, he needs a McCain victory. John McCain in the White House would be a vindication of Bush policies, but the election of Barack Obama would be a very clear repudiation. This time the president can't afford to just step aside and be a spectator.
So get ready for more campaigning from the First Cheerleader. He's on a mission he needs to accomplish.