Schwarzenegger said today that a "GOP majority will actually help Obama be reelected." Obviously not true of course.
As for 2014 the same southern dems that are up this time around won't be reelected the next time around.
SD Johnsoin, ARK Pryor, AK Begich, VA Mark Warner, CO Udall, NC Hagen, and LA Mary Landrieu. I say their position is dire regardless of who is in the white house.
SD-Johson will likely retire and be replaced with Hersth-Sandlin.
AR-Pryor has a popular name, I think he'd win even if he were up this year.
AK-Begich will probably have a tough race.
VA-Warner was a popular governor, he has a good chance.
CO-Depends on the ecenomy
NC-See CO
LA-If she were up this year, she'd look like Blanche Lincoln. It depends if the LA electorate is still as rabidly anti-Obama as it is today.