Trump's USPS' Postmaster General replacement fired 23 USPS executives. It's possible that vote-by-mail will be the easiest way for gerrymandering to occur.

"Lawmakers Demand Removal of Postmaster General DeJoy Over 'Nefarious' Efforts to Destroy the Postal Service and 'Aid Trump Reelection'" - https://www.reddit.com/r/politics/comments/i71z41/lawmakers_....