The liberal former candidate's backing of the centrist Nunn, who's running for retiring Sen. Saxby ChamblissClarence (Saxby) Saxby ChamblissLobbying World Former GOP senator: Let Dems engage on healthcare bill OPINION: Left-wing politics will be the demise of the Democratic Party MORE's (R-Ga.) seat, is the latest sign top Democrats are lining up to support her candidacy. Dean is a lobbyist at the law and lobbying firm, as is Gordon Giffin, Nunn's top advisor and a longtime Georgia Democratic strategist.

Democrats are hopeful that Nunn can give the GOP a tough race in the red-leaning state.