The Obama’s will never willingly leave the White House. If Obama loses in 2012 (if an election is allowed even), 21JAN2013 will find the White House a battle ruin.
I think that Odumbo is more likely to try and pull a Hugo Chavez and rig the election and then have then have the UN certify that Odumbo actually won. Then he will pull a Honduran Zeyla type move and stay on forever.