The primaries provided the first test of a new U.S. House map that was redrawn in May by Republican state lawmakers after the U.S. Supreme Court weakened federal Voting Rights Act protections for minorities. Memphis voters voice dismay over redistrictingFor decades Memphis, the most populous city in Shelby County, formed the base of its own congressional district. State Rep. Johnny Garrett won a Republican contest that included Rose's recent chief of staff, former U.S. Rep. Van Hilleary. Republican voters pick Blackburn for governorU.S. Sen. Marsha Blackburn defeated Rose in the GOP primary to succeed Gov. Sen. Bill Hagerty won the Republican primary without opposition and will face Marquita Bradshaw, who won the Democratic nomination, in November.