Incumbent Republican senator Saxby Chambliss announced on January 25, 2013, that he would not run for re-election, making it an open-seat race.

If no candidate had received a majority of the vote, a runoff would have been held between the top two finishers on January 6, 2015, after the 114th Congress would have been sworn in, but in the end, David Perdue defeated Michelle Nunn by a margin of 7.7%.

[4] In the early stages of the Republican primary campaign, the field was deemed a "clown car" by The Hill due to the prominence of far-right candidates within it.

[5] Prominent Tea Party supporter and U.S. Representative Paul Broun was the early frontrunner for the Republican nomination, with Public Policy Polling showing him with a double-digit lead over his fellow candidates.

[6] During September 2013 several prominent Republicans considered buying ads against Broun's campaign, as he was seen as unelectable due to his far-right policy positions, which included support for Young Earth creationism and the contention that medical schools taught "lies from the pits of hell.

The 30.6 percent won by Perdue is the lowest ever for a first-place finisher in a Georgia U.S. Senate primary by either party in state history.

[90][91] Kingston was perceived as the more conservative candidate in the race, but Perdue defeated him, largely due to strong support from business-friendly voters residing in the Atlanta suburbs.

[123] On May 20, 2014, Nunn won the Democratic primary for the Senate seat with 75 percent of the vote,[124] having skipped many of the debates and public forums where three other little-known candidates appeared.

[157] First Lady Michelle Obama campaigned on behalf of Nunn, as part of an effort to increase African-American voter turnout in midterm elections.

"[169] As the campaign moved on, Nunn made her father a focal point, staging joint appearances with him at military bases and saying that she would emulate his bipartisan approach to legislating.

[3] Nunn targeted past pre-political statements of Perdue where he had said he was "proud of" his outsourcing efforts, and for the job losses that followed the final closure of Pillowtex.

[177] Nunn supported expanding federally mandated background checks to include all local sales to prevent the possibility that mentally ill persons would be able to buy a firearm.

[119] Following the start-up problems with the associated HealthCare.gov website, Nunn broke with the Obama administration and said that the individual mandate portion of the law should be delayed.

[185] With Broun With Chambliss With Gingrey With Grayson With Handel With Kingston With Price With Yu Official campaign websites (Archived)