
John Mackenzie
Republican candidate for U.S. House in California

CA-04 primary: first place
Primary Election
Party selects its nominee.
Live Odds — CA-04 primary: first place
Current prediction-market probability for the candidate, updated as market prices change.
1%chance to win
Candidate Overview
Key details about the candidate’s background, party, office sought and current campaign.
Current roleHealthcare professional
PartyRepublican
LocationCalifornia
BackgroundHealthcare professional
Notable personal detailsLaurie John MacKenzie (often styled as L. John MacKenzie) is a Republican candidate for the U.S. House in California's 4th Congressional District in the 2026 cycle. He has described himself as a military veteran, healthcare professional, and small business owner. His campaign states he served 10 years in the U.S. Marine Corps and 15 years in the U.S. Air Force Reserve and has worked in healthcare with a focus including medical and mental health challenges.
SourcesShowHide
Latest News
John Mackenzie is in the news as a candidate in a crowded California primary landscape, where several races are being shaped by the state’s top-two system and redistricting. The latest reports focus on competitive contests and shifting general-election matchups, with candidates trying to break through in districts that have been redrawn or are seeing strong primary challenges. Overall, the coverage suggests a volatile campaign environment, but the summaries provide limited direct detail about Mackenzie’s own actions or results.
Campaign Fundraising
Latest report: Cycle 2026Campaign finance totals from the latest available reporting period.
2026
LatestCycle 2026
Source: FEC
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We're monitoring and will update when new data impacts the race.
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