Incumbent Rep. Mike Thompson faces Democratic challenger in California primary

Long‑time California Representative Mike Thompson is seeking re‑election to the U.S. House. The November race will feature a primary challenge from another Democrat. Thompson has served multiple terms representing the district. The challenger has positioned themselves as a fresh alternative. Campaign issues include local economic development and national policy. Voter registration drives are intensifying ahead of the primary. Political observers note the contest could signal shifting district dynamics. The outcome will be decided in the November general election.