Stuff like this is easy to imagine and it's important to understand that this is every bit as much a coup as a colonel seizing government ministers and television stations. There's no such thing as a legal way to overthrow the government!
This piece is maddeningly sparse on specifics, when it's easy to think of viable hypotheticals
Example:
➡️ Find just 1 person in any Fifth Circuit state claiming they voted for Biden
➡️ File suit claiming Ds nominating anyone who was not the primary winner violates the Guarantee Clause
1/
Like in a coup, the key factor is surprising or discouraging the majority into inaction, so the coupers have a time window in which to seize power and establish the fait accompli.
Which seems to be working, given how the institutionalists are talking themselves in circles and fanning themselves.