Americans associate McCain with Bush and Obama with change, and the race is tied.
The way the Obama campaign sees it, Democrats still have an enthusiasm advantage and a partisan ID advantage, so 50-50 is actually 52-48, and besides, they don't care about the national polls.
The way the McCain campaign sees it is that Obama's message brings diminishing returns, and it's the McCain-Palin ticket right now that is new and exciting.
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