Rep. Steve Cohen (D-TN), one of the longest-serving Democrats in the House, announced this week that he will not run for re-election following changes to Tennessee's congressional map that effectively made his district unwinnable. Cohen, who has represented Memphis in Congress since 2007, cited the redistricting outcome as the decisive factor in his decision to step down after 10 terms.

The Tennessee map changes are part of a broader wave of redistricting activity reshaping congressional districts ahead of the 2026 midterm elections. Across multiple states, new maps are forcing incumbents to weigh whether to run in altered territory, retire, or challenge one another in primaries. The Congressional Black Caucus is among the groups expected to feel the impact most acutely, with projections suggesting it could lose seats as a result of ongoing redistricting disputes.

Cohen's Memphis-area district, which has historically been majority-Black and reliably Democratic, was redrawn in a manner that dispersed its core Democratic constituencies. The move was widely seen as a Republican-led effort to eliminate a safe Democratic seat in an otherwise deep-red state. Cohen represented the district continuously since winning his first race in 2006.

The redistricting cycle has produced legal and political battles in numerous states, with challenges working through both state and federal courts. Advocates for minority voters have argued that several new maps dilute the voting power of Black and Hispanic communities in violation of the Voting Rights Act, while state legislatures have defended their maps as legally drawn and politically neutral.

Cohen's retirement adds to a growing list of incumbents declining to run in redrawn districts, a pattern that both parties have historically used to clear the field of opposition without a direct electoral fight. His departure leaves Democrats with the task of finding a competitive candidate for a seat that, under the new lines, may no longer favor their party.