According to pool reports, Nunn attended the fundraiser for the Democratic Senatorial Campaign Committee this weekend, along with DSCC Chairman Michael BennetMichael Farrand BennetGOP, Dem lawmakers come together for McCain documentary Overnight Health Care — Sponsored by PCMA — Trump official won't OK lifetime limits on Medicaid Hillicon Valley: White House eliminates top cyber post | Trump order looks to bolster agency CIOs | Facebook sees spike in violent content | Senators push NIH on tech addiction | House to get election security briefing MORE (D-Colo.) and DSCC Executive Director Guy Cecil.

Nunn, a businesswoman and daughter of former Sen. Sam Nunn, D-Ga., is a favorite of Democrats, and recent reports have indicated she's leaning towards a bid. The DSCC declined to comment on her attendance at the fundraiser.

Democrats face a daunting map in 2014, with six incumbents retiring, many from red states. Republicans, in their pursuit of the six seats they'd need to flip control of the upper chamber, could take only states President Obama lost in 2012 and succeed.

Democrats face few offensive opportunities of their own this cycle. But Bennet, in his introduction at the Sunday fundraiser, said that "Georgia provides us with the greatest opportunity for a pickup" in 2014.

Republicans already have a crowded primary field, with four candidates — including Reps. Paul BrounPaul Collins BrounCalifornia lawmaker's chief of staff resigns after indictment Republican candidates run against ghost of John Boehner The Trail 2016: Let’s have another debate! MORE, Phil GingreyJohn (Phil) Phillip Gingrey2017's top health care stories, from ObamaCare to opioids Beating the drum on healthcare Former GOP chairman joins K Street MORE, Jack Kingston and former Georgia Secretary of State Karen Handel — launching bids.