Senior Obama campaign adviser David Axelrod defended the president's campaign on Sunday, responding to an attack that he is being overly negative rather than running on his record. "We've run probably $25, $27 million of advertising this campaign and virtually all of it has been positive," Axelrod said on CBS's "Face the Nation."

Host Bob Schieffer implied that the Obama campaign was going strongly negative. "Doesn't he have to talk about what he's accomplished and what he hopes to do before he talk about what the other guy's trying to tear down?" Schieffer asked. 

"Let me just correct one thing," Axelrod said. "We've run probably $25, $27 million of advertising this campaign and virtually all of it has been positive. A lot of attention was given to an ad, one particular ad… but if you live in the states where our advertising is running, you would see a steady stream of ads over the last month talking about the things that have happened over the last three and a half years, talking about all the hard work we've done together as a people to move out of the mess we were in when the president arrived. So I just have to challenge your premise."