Dem Kendra Horn wins Oklahoma seat in major upset

Dem Kendra Horn wins Oklahoma seat in major upset
© YouTube: Kendra Horn for Congress

Democrat Kendra Horn defeated incumbent Republican Rep. Steve RussellSteven (Steve) Dane RussellOklahoma New Members 2019 Overnight Defense — Presented by Raytheon — First lady's office pushes for ouster of national security aide | Trump taps retired general as ambassador to Saudis | Mattis to visit border troops | Record number of female veterans to serve in Congress Record number of female veterans to serve in next Congress MORE in Oklahoma's 5th Congressional District on Tuesday in a major upset.

Horn won 50.7 percent of the vote to Russell's 49.3 percent, flipping the district blue for the first time since the 1970s.

Horn was seen as unlikely to unseat Russell, who was seeking a third term and who had won reelection in 2016 by more than 20 points. Polls leading up to Tuesday's election consistently showed Russell with a double-digit lead. 

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The Oklahoman reported last week that Independence USA, the Michael Bloomberg-affiliated super PAC, was spending $400,000 to air a television ad supporting Horn. 

Prior to Tuesday, election handicappers at the nonpartisan Cook Political Report rated the race as likely Republican. FiveThirtyEight also had the race as likely Republican entering Tuesday.

According to FiveThirtyEight's forecast, Horn's victory was the biggest upset of the night.