Michael Boris scores upset victory in Nevada's 1st Congressional District Republican primary, defeating Trump-backed state Sen. Carrie Buck. OR Trump-endorsed state Sen. Carrie Buck wins Republican primary to take on Rep. Dina Titus, D-Nev., in Nevada's first congressional district.

Trump-endorsed Halo composer Marty O'Donnell advances in GOP primary to challenge Democratic incumbent Susie Lee in Nevada's 3rd congressional district.

Rep. Dina Titus wins the Democratic primary in Nevada's 1st Congressional District, defeating three challengers to secure her eighth term nomination.

Nevada's Democratic primary for governor sets up a showdown with GOP Gov. Joe Lombardo in one of the nation's most competitive gubernatorial races.

Rep. Susie Lee faced challengers in Nevada's 3rd Congressional District Democratic primary, one of the West's most competitive swing districts.

Graham Platner won the Maine Democratic primary for U.S. Senate on Tuesday, setting up a high-stakes race against Republican Sen. Susan Collins.

Lt. Gov. Pamela Evette and state Attorney General Alan Wilson advanced to a runoff for the Republican nomination for South Carolina governor, while U.S. Sen. Lindsey Graham won his own primary outright Tuesday in his pursuit of a fifth term in November.