From the article:

The U.S. Supreme Court handed the Trump administration a huge win Monday by allowing an executive order designed to sharply curtail mail voting to go into effect — a move California and other Democratic-led states have warned could thrust the midterm elections into chaos.

Rushing through unprecedented changes to the mail voting system will be especially challenging for California, where more than 80% of voters use mail ballots and every registered voter receives a ballot by mail.

In an unsigned ruling, apparently by a 6-3 vote, the court said the states would not show they would be harmed by the restrictions on mail voting and therefore lacked legal standing to challenge it in court.

Nothing good ever comes about from making things harder for people to vote.