Clinton launched her campaign's first radio ad in South Carolina on Monday.

COLUMBIA, South Carolina (CNN) — Stepping up the back and forth over Sen. Hillary Clinton's new radio spot targeting black voters, Clinton's South Carolina spokesman Zac Wright told CNN that state GOP chairman Katon Dawson's attack on the ad is "laughable" and "tragically misguided."

The Clinton ad says black voters in South Carolina are "invisible" to the Bush administration.

Dawson, in his first attack on a specific Democratic candidate, said Monday that Clinton will be invisible to South Carolina voters because she is a liberal who associates with "radical groups" and wants America "to surrender to the terrorists in Iraq."

"It would be laughable if it weren't such tragically misguided spin to avoid the reality of so many people in our state being invisible to the President," Wright said in an email. "If the Republican Party wants to defend George Bush and wrap themselves in his record, his handling of the war in Iraq or the 42 percent increase in the number of uninsured in South Carolina since he took office, that's their decision.

"But they may not find so many people joining them in the Bush corner as more and more Americans examine the state of our country under George Bush and decide that it's time for a candidate with the experience to make positive change real. That's Hillary."

– CNN South Carolina Producer Peter Hamby