#SCOTUS appears to have doubts about the acceptance of late arriving ballots (postmarked before election day but arrived after it). However, this is a problem largely caused by the degradation of service by the #USPS. https://apnews.com/article/supreme-court-trump-elections-mailed-ballots-a516e60209e68642f4d74947fa06017f
Supreme Court's conservative majority questions state laws on late mail ballots

The Supreme Court’s conservative majority sounds skeptical of state laws that allow the counting of late-arriving mail ballots, a target of President Donald Trump. The court heard arguments Monday in a case from Mississippi that also could affect voters in 13 other states and the District of Columbia, which have grace periods for ballots cast by mail. An additional 15 states that have more forgiving deadlines for ballots from military and overseas voters also could be impacted. A ruling is expected by late June, early enough to govern the counting of ballots in the 2026 midterm congressional elections. The court challenge is part of Trump’s broader attack on most mail balloting.

AP News