The McCain and Obama presidential campaigns traded accusations of mudslinging Monday in the wake of new ads dredging up infamous events from 20, 30, even 40 years ago.

Barack Obama & John McCain

Nancy Pfotenhauer, an adviser to the McCain campaign, said it's "absolutely essential" that Americans hear not only about his plans for the future but also "about the decision they have to make about these two individuals." She said she thought that commercials that raise new questions about Obama's associations "have struck a nerve" with the Democrat.