Glenn Reynolds (Instapundit) links to several comments that attack Romney for his faith. That's going to be the theme of the Obama campaign. They can't point to accomplishments - oh they can,but no one believes them - so they have to go for hate and bigotry.
The only problem is that they are preaching to the choir. They already have the base; the people who hate, the racists , the religious bigots, are already solidly on Obama's side.
They lose, and they lose badly.