New USPS postmark rule could impact mail-in ballots; experts say send early or use drop box

A new USPS postmark rule could disenfranchise mail-in voters by changing how postmark dates are assigned. - The rule, effective December 2025, states the postmark date may not align with when the Postal Service first accepted the mail.

- This could invalidate ballots in California and 13 other states with grace periods that count ballots postmarked by Election Day. - Experts recommend mailing ballots at least a week before the June 2 primary, using drop boxes, or voting in person.

The rule is part of broader efforts by the Trump administration to restrict mail-in voting, which was used by over 48 million Americans in 2024.