Election workers conduct ballot tabulation at the Los Angeles County Ballot Processing Center during California's state primary election in the City of Industry, Calif., on June 2, 2026. Patrick T. Fallon/AFP via Getty ImagesAll in all, 148,241 were rejected in the state's June 2 primary election, according to data released by the California Secretary of State's office, which manages elections. According to the data released earlier this month, more than 93,000 mail-in ballots were rejected by officials because they arrived too late. The data provided by the office did not list the rejected ballots by party registration. "Ballots rejected due to lateness are caused primarily to being postmarked too late to count, not because they arrived too late to count," Alexander told The Associated Press.