The GoP wins. (calm down, it's a hypothetical)
McCain is sworn in. (breathe)
The lich magic that holds McCain's body together dissipates.
Palin is sworn in
Palin has stroke when JK Rowling releases The Memoirs of
Albus Dumbledore which tells about a "morning-after potion" he invented in addition to his lifestyle
Members of the Cabinet bring in Tina Fey to play the part of the President.
SHE SOLVES ALL OF OUR CRISES!!
I call for a remake of Dave.