It would seem that the first step would be to delegitimize those election results and any ensuing laws or orders from those officials.
Election monitors make sense in third-world countries, where elections are administrated by corrupt government officials and literal ballot-box-stuffing is a possibility. But in the US, civilian volunteers with known party affiliations administer elections, and many states cast ballots electronically.
If you’re really concerned about the integrity of our elections at a ballot-box level, the best thing you could do would be to volunteer to administer elections in your local precinct.
Unfortunately violence might be necessary if fair elections can’t be guaranteed.