Georgia Democrat Michelle Nunn launched the first TV ad of her Senate bid Thursday with a nod to George H.W. Bush, who started a foundation she once oversaw.

"While leading President Bush's Points of Light Foundation, we grew it into the world's largest organization dedicated to volunteer service," Nunn says in the ad.

"I know things can be better," she concludes in the ad, which is titled "Optimist."

Nunn launched her ad just after a conservative group hit the airwaves with a negative spot tying her to President Obama. The contrasting ads illustrate the battle lines in the general election. Nunn is expected to cast herself as a moderate problem-solver while Republicans are preparing to tie her to to the president at every turn.

The daughter of former senator Sam Nunn, Michelle Nunn has a clear path to the Democratic nomination in one of the two states where Democrats have a chance of making a pickup this year. She's raised heaps of cash and has been gearing up for the general election while the crowded and competitive GOP field fights for the nomination.

Video surfaced Wednesday of one of the Republican candidates, David Perdue, casting the educational background of one of his opponents in a negative light. “I mean, there’s a high school graduate in this race, okay. I’m sorry, these issues are so much broader, so complex," he said, referring to former secretary of state Karen Handel (R).

The Atlanta Journal-Constitution reported that Nunn was spending at least $55,000 to air the ads on broadcast TV in Atlanta but that the campaign could also be airing the commercial in other markets.