Rep. Steve Cohen (D-TN) announced Friday that he will not seek another term in the U.S. House of Representatives.

The decision removes a veteran Democratic voice from Tennessee's congressional delegation and highlights the impact of redistricting on electoral viability.

Cohen has served 10 terms in the House [1]. He said that the new congressional map redrew his Memphis-based district in a way that makes his path to victory unviable [1], [2].

Redistricting occurs every decade following the census, but the specific boundaries drawn by state legislatures can drastically shift the political makeup of a district. In this case, the newly approved map dismantled the existing structure of Cohen's seat, a move that effectively ended his campaign for another term [1], [2].

Cohen's departure marks the end of a long tenure representing Memphis. The shift in the district's boundaries means the seat is no longer a sustainable stronghold for his candidacy [2].

Rep. Steve Cohen announced Friday that he will not seek another term in the U.S. House of Representatives.

This move illustrates how strategic redistricting can be used to eliminate political incumbents by altering the demographic and geographic makeup of their districts. By making a seat 'unviable,' map-makers can influence the composition of Congress without a single vote being cast in a general election.