When you got as much charisma and persuadability as Obama, it would take a thermonuclear holocaust to lose reelection. The economic downturn started during Bush's term and he can always leave the blame on the Bush regime. And when the economy gets worse he can just claim it's just an aftereffect of Republican policies enacted a long time ago blah blah blah and knowing the guillability of the electorate, they might just buy it.
Ronnie Reagan didn't mind with predecessor Jimmy Carter. (Smart man. And, hey, facts are facts!)
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