Democratic Parade:
Obama is gearing up for his 2012 presidential campaign. The landscape is not as rosy as it was when he first ran. The country is in a mess, which is not his doing of course, but he did the best he could out of a bad situation.
So now he rides a downtrodden party (represented by the donkey) to a new campaign for re-election in a dirty environment...yet and still keeping his head high.