(CNN) - John McCain's campaign is going to the tape.
Wasting little time attacking the newly-minted Democratic presidential ticket, the McCain campaign released a television ad Saturday morning featuring Barack Obama's running mate criticizing the Illinois senator in a primary debate last year.
The 30-second spot, set to air in key states, features an August 2007 primary debate during which Joe Biden was asked if he stood by his criticism Obama is not yet ready to be president.
"I think that I stand by the statement," Biden is shown saying.
The ad also features a 2005 interview of Biden during which he praised McCain, saying, "I would be honored to run with or against John McCain, because I think the country would be better off."