There's been a seemingly endless debate this week about whether New Jersey and Virginia were Barack Obama's fault.
But I've found the data point that ends the argument for me.
On April 15th Obama's national approval rating in Gallup was 63%. A Rasmussen poll that day showed Bob McDonnell leading Creigh Deeds 45-30 and a Quinnipiac poll showed Chris Christie leading Jon Corzine 45-38.
Those guys were getting creamed at the height of Obama's popularity. Jon Corzine and Creigh Deeds lost because of Jon Corzine and Creigh Deeds, not Barack Obama. No President is so amazingly popular that he can magically make leads of that magnitude disappear.