Five days before the election, a federal court moves Minnesota’s mail-in ballot deadline up a full week.

A federal appeals court invalidated Minnesota’s mail-in voting procedure Thursday evening, ruling that mail-in votes had to be received by the close of polls on Election Day, not simply postmarked by then, in order to be counted....
https://slate.com/news-and-politics/2020/10/federal-court-minnesota-mail-in-absentee-ballot-deadline-count-moved.html