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.

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.

Democratic state lawmaker Janelle Bynum beat Republican incumbent U.S. Rep. Lori Chavez-DeRemer to represent Oregon's 5th Congressional District, per the Associated Press. Why it matters: Bynum's win flips the swing district back to blue and adds another Democratic seat to the U.

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.

Incumbent Rep. Lori Chavez-DeRemer and challenger Janelle Bynum were engaged in a toss-up race with national significance.

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

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