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McCain's economic proposals include cutting the corporate tax rate, giving Americans a $5,000 tax credit for health insurance and cutting pork out of the federal budget.
Obama wants to push for expanded access to health insurance, repeal of the Bush tax cuts for the wealthiest Americans and a 10 percent mortgage credit.
"I think the weakness John McCain has is that he has a Republican sign on his back and he has supported the president's policies mostly over the last eight years and that's a huge problem he has," said ABC News political analyst Matthew Dowd.
That may may be why McCain domestic policy adviser Doug Holtz-Eakin recently fired away at President George W. Bush instead of Obama.
"The only thing he shares in common with President Bush is he understanding of good tax policy," Holtz-Eakin said on Bloomberg television. "Sadly, it seems that's all President Bush understood on the economy."
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