News flash: the U.S. was already in deep trouble long before Obama showed up on the scene.
Debts were mounting, Social Security and other entitlements were already long gone before Obama showed up.
Obama is merely the straw that is breaking the camel's back, so to speak. But that's not to say that McCain couldn't have played the exact same role as Obama, that conservatives would have subsequently taken the brunt of the blame, and that an evil Marxist like Obama would have been elected after McCain anyways.
Did you even vote in this primary?