California's 16th Congressional District held its June 2, 2026, top-two primary with incumbent Democrat Sam Liccardo facing Republican challengers Kevin Johnson and Peter Soule along with no-party-preference candidate Jotham Stein. Liccardo secured a commanding share of the vote, positioning him to advance alongside the leading Republican contender under the state's nonpartisan primary rules. The outcome reflects the district's partisan composition and limited intra-party competition, with results still subject to final certification and any potential recounts. The November 3 general election will pit the two primary advancers against each other, where factors such as turnout patterns and broader statewide dynamics could influence the result. No other major developments have altered the field since candidate filing closed in March.