On or before January 6th 2021 when the CONgress counts the electoral votes, one CONgress critter and one SINator could sign an objection to the votes and really toss a turd in the frying pan. Likelyhood? Pretty close to zero due to lack of testicular fortitude in either house.
I expect Pence to do just that
Matt Gaetz has publicly stated he would be the House side of that challenge.
What about Ted Cruz or Rand Paul? Maybe Rick Scott.