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US Sen. Johnny Isakson wins re-election in Georgia

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ATLANTA – Georgia Republican Johnny Isakson has won re-election to the U.S. Senate, holding off two challengers.

Isakson relied on a series of television ads focused on his Senate work, largely avoiding references to the presidential campaign. Though he was expected to win, Isakson sometimes struggled to draw a line between himself and Donald Trump while maintaining support for the party's divisive presidential nominee. The 71-year-old also dealt with questions about his health. He has Parkinson's disease.

Democrat Jim Barksdale is a newcomer to state politics and ran a sleepy campaign until early October when he ramped up criticism of Isakson's continued endorsement of Trump. But unofficial results suggest the shift was too little, too late.

Security was a top concern for election officials across the country this year. Federal and state officials were on guard for attempted attacks by foreign or domestic groups trying to generate confusion or undermine confidence in the results.

Secretary of State Brian Kemp says that his office has prepared for any attempts to attack the website where unofficial results are posted. Kemp says the site is functioning as intended with no hint of trouble.

He says the agency has back-up plans to keep people and media around the state updates if the site was targeted. Kemp's comments came in an interview with WSB-TV.