The McCain campaign released a new web ad that uses Barack Obama's past statements on public financing to attack the Democrat for turning down the funds.

Entitled "Words," the ad opens with a shot of Obama saying, "Don't tell me words don't matter."

It then cuts to Obama expressing his support for public financing and saying he'd sit down with John McCain "to make sure the system works for everybody." Then the ad shows Obama making the announcement that his campaign would turn down the public funds and proceeds to highlight newspaper editorials calling the Illinois senator's move "opportunistic" and "disingenuous," among other things.

The ad ends with an on-screen caption that reads, "CHANGE That Works For Him: Breaking His Word."

Watch the ad below.