California's 45th congressional district held its nonpartisan primary on June 2, 2026, with incumbent Democrat Derek Tran facing five Republican challengers. Early results and vote counts show Tran advancing comfortably with over 50 percent support, while Republican candidates including Chuong Vo and Chi Charlie Nguyen compete for the second spot to reach the November general election. The district's voter registration and recent electoral shifts favor the Democratic incumbent, reinforced by his substantial fundraising edge over the field. Multiple Asian American Republican entrants drew attention in areas with large Vietnamese American populations, though no single challenger has emerged to close the gap. The top-two primary system determines advancement independent of party, and final certification of results will confirm the general election matchup.