I would think that Obama would not be considered as a running mate for Hitlery for many reasons, not the least of which would be the personal friction between the two.
And I wouldn't be so pessimistic about November. Her Royal Thighness will engender more ill-feeling against her than any major party candidate in American history, and for good reason! Romney would more than handle his own against her in face-to-face debates.
You see personal friction. I see a tag team.
I will be voting early today for Romney here in Cook (Crook) County, IL