What odds would you give? It's pretty hard to be voted out as President in the US once the people have voted you in office, in the 20th Century there were only three Presidents who failed in their re-election bids after winning their original tries (Hoover, Carter, Papa Bush). It's pretty hard to predict general public opinion on the guy as an office-holder after 6 months out of 4 years, so if someone agrees to 1:1 odds I think you've found a sucker.