Incumbent Democrat Raul Ruiz faces three Republican challengers—Joe Males, Ronald Huffman, and Ceci Andrade Truman—in California's June 2, 2026, top-two primary for the 25th congressional district. The safely Democratic district, with a partisan voting index favoring Democrats, positions Ruiz as the clear frontrunner to advance, while Republican voters will determine the second nominee through their primary contest. Fundraising data shows Ruiz holding a substantial lead in contributions over the challengers, consistent with typical incumbent advantages. The filing deadline passed in March with no subsequent withdrawals or major shifts reported. Early voting and ballot distribution are underway ahead of the primary, which will set the general election matchup on November 3.