(CNN) - John McCain launched a new television ad Wednesday morning that calls Barack Obama flat-out 'not presidential,' hours after the two men squared off in a presidential debate that notably lacked few pointed jabs from either candidate.
The 30-second spot also continues the McCain campaigns newest line of attack against the Democratic presidential candidate, asking "Who is Barack Obama?"
“The National Journal says he’s the Senate’s most liberal," the ad's narrator says. "How extreme. But when pressed, how does he defend himself?"
Fact check: Is Obama the most liberal senator?
"They’re not telling the truth," Obama is shown saying in a television interview. "I hate to say that people are lying, but here’s a situation where folks are lying."
"Mr. Obama, we all know the truth…Not presidential," the ad's narrator responds.
The campaign says the ad will air nationally, though the extent of the buy remains unclear.