11/24/2008 05:12 am ET Updated May 25, 2011

Polls Show Obama Wins On Tax Issue

In the final weeks of the presidential campaign, John McCain has turned to an argument that has served Republicans well in recent history, using stump speeches and television ads to drive home the idea that the Democratic presidential nominee would raise taxes on average Americans.

Campaigning across the battleground state of Florida in his "Straight Talk Express" bus on Thursday, McCain invoked Joe the Plumber, the Ohio tradesman who McCain argued is the kind of voter who would be harmed by Sen. Barack Obama's economic policies.

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