Democratic Rep. Lloyd Doggett, the longest serving member of Texas' congressional delegation, announced Thursday that he will retire instead of running for re-election if new congressional district boundaries aren't rejected in court,

After Texas moved forward on a new Trump-backed congressional map this week, California Gov. Gavin Newsom responded, "It's on," moving forward on his own redistricting plan that favors Democrats.

Texas is on the brink of redrawing congressional districts in a partisan bid to give Republicans five additional districts. The move is setting off a bipartisan war across the U.S.