In a 5-3 ruling on Monday, October 26, the United States Supreme Court denied a request to extend Wisconsin’s mail-in ballot deadline. Voting against the request for extention were Chief Justice John Roberts, and Associate Justices Neil Gorsuch, Brett Kavanaugh, Clarence Thomas, and Samuel Alito.
Justice Elena Kagan dissented, joined by Justices Stephen Breyer and Sonia Sotomayor.
The vote was 5-3 because the recent death of Associate Justice Ruth Bader Ginsburg left an open seat.
This was the same day that Amy Coney Barrett was confirmed by the United States Senate as the newest Associate Justice.
For a good discussion of the ruling that includes a summary of legal history on elections in Wisconsin, read Amy Howe at SCOTUSblog.