Democratic Rep. Steve Cohen of Tennessee announced Friday that he is ending his bid for reelection after his Memphis-based congressional district was carved up through redistricting efforts by the Republican-controlled state legislature.

Cohen, who has represented the 9th Congressional District since 2007, said in a statement that he would not run in any of the three newly drawn congressional districts that replaced his current seat. "I don't want to quit. I'm not a quitter. But these districts were drawn to beat me," Cohen told reporters in his Washington, D.C. office.

The new congressional map, signed into law earlier this month by Tennessee Governor Bill Lee, reshapes Cohen's majority-Black Memphis district in a way that gives Republicans electoral advantages. The 9th District was the state's only majority-Black congressional district. Tennessee became the first state to pass new congressional districts following a recent Supreme Court ruling that weakened federal Voting Rights Act protections for minorities.

Cohen indicated he is challenging the redistricting effort in court and said he would reenter the race if the lawsuit succeeds in restoring his original district. The longtime House Judiciary Committee member has been known for his focus on voting access and civil rights during his nearly two decades in Congress.

With Cohen's retirement, Tennessee's congressional delegation is likely to become entirely Republican after the next election. Cohen has been among the last white Democrats representing the South in Congress. He warned that an all-Republican delegation could leave Tennessee out of consideration when Democrats regain control of the White House in the future.