Barack Obama's campaign is circulating video of John McCainJohn Sidney McCainSarah Palin offers Harris advice: 'Don't get muzzled' McSally gaining ground on Kelly in Arizona Senate race: poll Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump MORE previously proposing more taxes on the wealthy.

The Obama campaign is trying to show McCain once supported the same type of progressive tax system that he's now attacking the Democratic candidate for supporting.

In the video, first posted on Daily Kos, McCain is shown on cable news shows and the Senate floor as recently as 2004 talking about his opposition to President Bush's income tax cuts for the wealthiest 1 percent of Americans.

The campaign also pointed out that McCain said in 2000 that he thought wealthier Americans could pay more taxes.