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.