One of the largest surprises in the 2018 midterms occurred in Oklahoma's 5th congressional district. Democrat Kendra Horn defeated incumbent Republican Steve Russell by about 1.5% in this Oklahoma City-area district. Just two years earlier, Russell had been reelected by 20%, while Donald Trump won the district by more than 13 points over Hillary Clinton. Horn became the first Democrat elected in the district since the 1970s and the first in any Oklahoma district since 2010.

The district is a top GOP target in 2020. We're about to find out who the party's nominee will be. Businesswoman Terry Neese and state Sen. Stephanie Bice meet in a runoff election. Neither received a majority of the vote in a nine-way primary held June 30. Neese finished first with 36%, while Bice took second with 25%.

Polls close at 8:00 PM Eastern Time. Live results will appear below after that time.