After Janelle Bynum declared her victory and the Associated Press officially called the race for Oregon's 5th Congressional District Thursday morning, incumbent Lori Chavez-DeRemer released a statement formally conceding to Bynum.

Incumbent U.S. Rep. Lori Chavez-DeRemer is being challenged by state Rep. Janelle Bynum for Oregon's 5th Congressional District seat.

Democrat Janelle Bynum has defeated incumbent Republican U.S. Rep. Lori Chavez-DeRemer and will give Oregon a 5-1 Democratic majority in Congress, the third time she has beaten her Republican rival in an election in less than a decade.

Democrat Janelle Bynum wins election to U.S. House in Oregon's 5th Congressional District, beating incumbent Lori Chavez-DeRemer

DeRemer, the freshman incumbent, is trying to fend off a challenge from Democratic state lawmaker Janelle Bynum.

Bynum, a three-term state legislator, flipped back a congressional seat that Democrats had previously held for years.

Surrounded by a hastily assembled group of campaign volunteers, Democrat Janelle Bynum declared victory in Oregon’s closest congressional race.

U.S. House Rep.-elect Janelle Bynum delivered a victory speech at her campaign headquarters in Happy Valley Friday. Bynum, a Democrat, thanked her supporters and campaign workers and outlined her vision for the position she will take over from Republican Lori Chavez-DeRemer. Dave Killen / The Oregonian

Bynum, a state representative who was backed and funded by national Democrats, ousted Lori Chavez-DeRemer to become Oregon's first Black member of Congress.