The question in the case was not a mail-in ballot rule itself but whether political candidates have the right to challenge the rules governing the vote count in their election.
A vote-by-mail ballot drop box in Chicago. The Illinois case is one of several lawsuits brought by allies of President Trump challenging rules around mail-in ballots after his 2020 election loss.
The justices heard arguments over whether oil companies sued by Louisiana could move the cases from state to federal court, a venue thought to be friendlier to corporate interests.