Democratic Rep. Steve Cohen of Tennessee is ending his bid for reelection. He's just the latest lawmaker to have his career upended by the redistricting battles that are sweeping the country. Republicans in Tennessee this month enacted a new U.S. House map that carves up a Cohen’s majority-Black district, reshaping it to the GOP’s advantage. It's part of President Donald Trump’s strategy to hold on to a slim Republican majority in the November midterm elections. Cohen has represented his Memphis-based district for nearly two decades. He lamented that Tennessee would likely shift to an entirely Republican delegation after the next election.