(CNN) - Rep. Charlie Melancon, the Democratic Senate nominee in Louisiana, plans to run a two-minute television ad as early as Wednesday night addressing his GOP opponent's 2007 prostitution scandal, a spokesman for Melancon's campaign said.
The ad, an abridged version of a Melancon campaign film called "Forgotten Crimes," features an audio recording of a "French Quarter prostitute," who describes her experience with Sen. David Vitter.
"He went in, took a shower, spoke very little to me at first," she says. "He did his thing. He wasn't there 15, 20 minutes at that."
Recent polls have shown Melancon trailing Vitter.
The new ad also includes statements by various unidentified Louisiana residents.
"If you're writing the laws, you should abide by laws," one resident says. "And if you break the law you should suffer the consequences as a regular citizen."
Vitter was linked to the so-called D.C. Madam in 2007, eventually admitting that he committed a "very serious sin."
Jeff Giertz, a spokesman for the Melancon campaign, said the campaign hopes the ad highlights unanswered questions by Vitter and a "double standard" for the senator.
Vitter has two new statewide ads out, including one calling Melancon "Barack Obama's biggest fan."
The Vitter campaign offered no immediate response to the prostitution scandal ad.