Less than a month after Democrats scored big victories in the Nov. 4 general election, voters in a heavily Republican Tennessee congressional district will fill a vacant seat Tuesday in the closely divided U.S. House.

Republican Matt Van Epps and Democrat Aftyn Behn are the nominees to replace former GOP Rep. Mark Green. The district includes parts of heavily Democratic Nashville, although most of the district has elected only Republicans to Congress for more than a dozen years.

Van Epps is a West Point graduate and former Army helicopter pilot who headed the Tennessee Department of General Services under Republican Gov. Bill Lee. With endorsements from both Trump and Green, he easily won the October special primary against 10 opponents.

Behn is a state representative first elected in a 2023 special election. She narrowly won a four-way Democratic primary that featured two other state representatives and a well-funded local businessman. A former political organizer and progressive activist, Behn was described by some state Democrats as “our very own AOC of TN,” a reference to Rep. Alexandria Ocasio-Cortez of New York. Prominent Van Epps backers have frequently repeated the nickname in support of the Republican nominee.