[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/10/10/art.mccainad.cnn.jpg caption="The McCain campaign is targeting Obama's connection to Ayers in a new ad."](CNN) - John McCain is continuing his effort to associate Barack Obama with 1960's radical William Ayers, launching a national campaign ad Friday that accuses the Illinois senator of "blind ambition."
"Obama's blind ambition. When convenient, he worked with terrorist Bill Ayers. When discovered, he lied. Obama. Blind ambition. Bad judgment," the ad's narrator says.
Congressional liberals fought for risky sub-prime loans. Congressional liberals fought against more regulation," the narrator continues. "Then, the housing market collapsed costing you billions. In crisis, we need leadership, not bad judgment."
The spot is the latest in a series of attempts by the Arizona senator’s campaign to raise questions about Obama's past ,and portray the Democratic presidential nominee as less than candid about his political origins.