Redistricting has placed two Republican incumbents, Ken Calvert and Young Kim, in the same CA-40 contest for the November 2026 general election after both advanced from the June 2026 top-two primary. Calvert captured roughly 35 percent of the primary vote to Kim’s 21 percent, establishing a clear edge among Republican voters in the newly configured district that spans parts of Orange and Riverside counties. This performance, combined with Calvert’s longer tenure and committee leadership role, has shaped trader assessments of his stronger position heading into the fall campaign. Fundraising reports show Kim holding an initial cash advantage, yet outside spending and primary momentum have reinforced Calvert’s lead in the two-candidate matchup. The absence of Democratic contenders in the general election further narrows the contest to intra-party dynamics between the established officeholders.