The new voting districts approved Thursday could give Republicans a chance to win all nine of the state's congressional seats in the November midterm elections.
WATCH: Tennessee Democrats lock arms in protest as GOP lawmakers approve new congressional map
Tennessee is the first state to adopt new districts since a U.S. Supreme Court ruling last week that significantly weakened federal Voting Rights Act protections for minorities.
President Donald Trump has urged more Republican-led states to redraw their districts in light of the court ruling. Louisiana, Alabama and South Carolina also have taken steps toward redistricting.