Ken Calvert holds the leading position in trader consensus for California's 40th Congressional District seat, reflecting his stronger primary performance and the district's composition after Proposition 50 redistricting. In the June 2, 2026 top-two primary, Calvert received about 35% of the vote compared to Young Kim's 21%, advancing both Republicans to the November 3 general election while excluding Democratic candidates. Calvert represents roughly 51% of the newly drawn district versus Kim's 35%, a factor analysts tie to his primary edge in this Republican-leaning area rated solid or safe by major forecasters. The contest has featured mutual attacks over congressional records and alignment with prior Trump positions, though no major shifts in polling or endorsements have emerged since the primary. This setup positions the race as an intraparty contest where Calvert's incumbency length and territorial overlap provide the main structural advantages reflected in current pricing.