Not if they feel that Hillary stole the nomination from their fair-haired boy. Folks who have been weaned on the politics of victimization will not take kindly to getting so close to the presidency, only to have the Old Superdelegate network steal it from them.
After months of propogandizing by the MSM, an endorsement by Obama for Hitlery, and the possible enlisting of Obama for VP, they will gladly pull the lever for the Beast.