Just like Justice Kennedy was retiring in October.
There is no reason to get excited about this until and unless it actually occurs. Regardless, this underscores why it is so vitally important that the GOP retains control of the Senate - Schumer would never allow a GOP nominee to even get a vote on the floor of the Senate - and that message should and must be used to oust Joe Manchin - no matter how “independent” he tries to cast himself to be.
I doubted he was going to retire just yet when I saw the cases that were possibly coming up. But once those are past the oral arguments and internal voting, I think he’ll be ready to leave.