Obama and Biden -- and their wives -- are set to hit the road Friday, touring key battleground states following the Democratic convention's conclusion Thursday night. From an Obama campaign press release:

Chicago, IL -- Today, the Obama campaign announced that United States Senators Barack Obama and Joe Biden will kick off a battleground state tour dubbed "On the Road to Change" following the Democratic National Convention. Senator Obama, Senator Joe Biden, Michelle Obama and Dr. Jill Biden will depart Denver Friday for Pennsylvania, the first stop on the bus tour. The "On the Road to Change" tour will make stops in Pennsylvania, Ohio and Michigan, and will mark Obama and Biden's first campaign tour as the Democratic nominees. Obama and Biden will meet with voters to discuss America's economic challenges and the Obama/Biden blueprint for change.

Politico's Jonathan Martin reported yesterday that McCain will also do a battleground-state tour over the coming weekend with his yet-to-be-announced running mate, whom will be announced at a Dayton, Ohio, rally Friday.

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