I think it comes down to the fact that magic is gone and people aren't mesmerized by Obama like they once were. Filling a stadium of that size is just not possible in 2012 for Obama let alone Biden. Especially in a state they are very likely to lose in the general election. Don't believe me, just take this weatherman's opinion of the situation. The chance of storms is just 20% and that wouldn't be enough to cancel a big name concert or Panthers game, but its enough to cancel the democrat's big name speeches?
I think it comes down to the fact that magic is gone and people aren't mesmerized by Obama like they once were. Filling a stadium of that size is just not possible in 2012 for Obama let alone Biden. Especially in a state they are very likely to lose in the general election. Don't believe me, just take this weatherman's opinion of the situation. The chance of storms is just 20% and that wouldn't be enough to cancel a big name concert or Panthers game, but its enough to cancel the democrat's big name speeches?