Michelle Nunn, a Democratic U.S. Senate candidate in Georgia, raised $2.4 million in the first quarter -- totaling to $5.7 million since she declared her run for office, the Huffington Post reported.

Her first quarter funds are an increase from the last quarter, where she raised $1.6 million. Her cash on hand was not immediately available.

So far, her Republican opponents have yet to come close; U.S. Rep. Jack Kingston raised $1.1 million in the first quarter, while U.S. Reps. Paul Broun and Phil Gingrey both raised around $300,000.

A spokesman for Republican David Perdue, former CEO of Dollar General, said he will report about $573,500 in contributions in three months with a total of $700,000 in the bank.

Nunn, daughter of former U.S. Sen. Sam Nunn (D-Ga.), is the founder and CEO of Points of Light, an international nonprofit organization.

"I am so grateful for the support our campaign is receiving as I take our message across the state," Nunn said in a statement on Monday. "My own experience empowering and mobilizing volunteers has shown me that individuals working together can make an extraordinary difference in their own lives and the lives of others. This campaign is no different."

Seven Republicans and four Democrats will face off in the May 20 primary.

In a recent TV ad, Nunn included a photo of her and former President George H.W. Bush in an effort to connect with voters across party lines.

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

However, a Bush spokesman made it clear that the former president is not endorsing her campaign and was not aware of the photo in the ad. 

"We certainly did not give approval for that, and in fact the president was disappointed to see that his image had been included in the political ad as it was," spokesman Jim McGrath told the Atlanta Journal-Constitution.