It would seem that the first step would be to delegitimize those election results and any ensuing laws or orders from those officials.
Unfortunately violence might be necessary if fair elections can’t be guaranteed.
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.