Cindy McCain calls Obama campaign 'dirtiest' ever

(CNN) - Cindy McCain, with of Republican presidential nominee John McCain, lashed out at his Democratic opponent, Barack Obama, on Tuesday, telling a Tennessee newspaper that Obama has waged the "dirtiest campaign in American history."

"What I have found is that it's necessary to make sure the American people understand what we have to say, what we stand for as a husband and wife, and what we will do for the American people if we're lucky enough to be elected," she told The Tennessean.

In the past few days, both campaigns have become more aggressive in their attacks.

In an admitted effort to turn the dominating narrative away from the nation's ailing economy, McCain's campaign has launched a new offensive questioning Obama's trustworthiness. It noted Obama in the 1990s worked in a nonprofit group with a founding member of the Weather Underground, the 1970s radical group. Obama's campaign retaliated Monday with a 13-minute documentary Web video detailing the Arizona senator's involvement in the Keating Five scandal in the 1980s.