A theory:

How long has the DS been keeping RBG alive? About 2 years?

How many decisions has she made from remote locations?

Who was writing her decisions for her?

Timing is everything.

If the SC flips from 5-4 Liberal to 5-4 Conservative before the election then the SC can hold a special hearing to make mail-in balloting Unconstitutional.

Everyone has to vote in person, end of story.