FILE - In this Nov. 3, 2011 photo provided by A Billion + Change, Points of Light CEO Michelle Nunn speaks at the launch of A Billion + Change, a national campaign to mobilize billions of pro bono and skills-based service resources by 2013, at a ceremony on Capitol Hill in Washington. The race for Georgia's U.S. Senate seat started to take shape Monday as Nunn, a Democrat, announced plans to run for her father's old seat, joining a crowded field of Republicans contenders. (AP Photo/A Billion + Change, Kevin Wolf, File)

Georgia Democratic U.S. Senate candidate Michelle Nunn raised $2.4 million in the first three months of 2014, bringing her total haul to $5.7 million since she declared her intent to succeed retiring Sen. Saxby Chambliss (R-Ga.).

The first-quarter number is an increase from that of the previous quarter, when she took in $1.6 million. It also significantly bests the totals of her GOP opponents who have put out their numbers: Rep. Jack Kingston (Ga.) brought in $1.1 million in the first quarter, while Reps. Paul Broun (Ga.) and Phil Gingrey (Ga.) both raised just over $300,000.

Nunn, who is the daughter of former Sen. Sam Nunn (D-Ga.), is considered a top Democratic recruit for 2014 primarily because of her background as a nonprofit CEO.

"I am so grateful for the support our campaign is receiving as I take our message across the state," Nunn said in a statement 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."