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Nearly 150,000 mail ballots rejected in California’ primary despite efforts to count every vote

Lateness drove most rejections, and officials said signature problems and other errors also kept thousands of ballots from being counted.

  • Nearly 150,000 California voters had their mail-in ballots rejected during the June primary, a significant spike from recent elections despite state efforts to boost participation and count every ballot.
  • Voting experts suspect U.S. Postal Service changes affecting postmark timing contributed to delays; lateness accounted for 93,479 rejected ballots in the June election, by far the largest disqualification factor.
  • Mismatched signatures caused nearly 44,000 rejections, while over 8,300 ballots lacked signatures entirely; rejections increased from the 2024 primary, when 108,982 mail ballots were voided.
  • Following the June primary, President Donald Trump renewed criticism of California's slow vote counting; the 'red mirage' phenomenon occurs when early returns shift as mail-in ballots are counted.
  • A 2025 Brookings Institution report found mail-voting fraud is minuscule—about four cases per 10 million ballots—while California's system remains designed to protect against fraud and maximize participation.
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He knows why nearly 150,000 mail votes were rejected in California primary and what role the deadlines and signatures played.

·Vicente López, Argentina
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Votebeat broke the news on Thursday, July 23, 2026.
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