WASHINGTONGeorgia voters head to polls for special electionVoters cast their ballots in Georgia's 6th Congressional District special election at a precinct in the Sandy Springs area of Atlanta on April 18, 2017. Eighteen candidates are running in the non-partisan special election to fill Georgia's 6th Congressional District seat previously held by Health and Human Services Secretary Tom Price, a Republican.Erik S. Lesser, European Pressphoto AgencyDemocratic candidate Jon Ossoff greets volunteers and supporters at a campaign office during an election day kickoff rally as he runs for Georgia's 6th Congressional District in a special election to replace Tom Price, who is now the secretary of Health and Human Services on April 18, 2017 in Atlanta. The election will fill the congressional seat that has been held by a Republican since the 1970s.Joe Raedle, Getty ImagesVoters cast their ballots in a special election for Georgia's 6th Congressional District on April 18, 2017, in Atlanta.Joe Raedle, Getty ImagesGeorgia voter stickers are seen at a precinct in the Sandy Springs area of Atlanta.Erik S. Lesser, European Pressphoto AgencyVoters cast their ballots in Georgia's 6th Congressional District special election.Erik S. Lesser, European Pressphoto AgencyAtlanta voters cast their ballots in a highly contested race for Georgia's 6th Congressional District in a special election to replace Tom Price, who is now the secretary of Health and Human Services on April 18, 2017.Joe Raedle, Getty Images