They certainly did it with all people involved with the election, but certainly not President Trump. But they didn't have to go that far with everyone. Some people just accept some money and they're in. Others have a skeleton in the closet.
The best strategy would IMHO be to just ignore DC, enforce state law and see what happens. That way the ball is in in their court. If they choose kinetic action (very likely) preparations should have been made beforehand.
You seem to be unaware that for the Stalinists it doesn't matter who poses as the "president". Any guy from the street will do. Who ever is in the White House is only there to sign executive orders prepared by the junta.
President Trump was strong enough. He accomplished everything, if sometimes only to a degree. We all knew election fraud was coming, but nobody could know that it would come on an industrial scale in a no-matter-what way. Trump outran Biden even more than Hillary to compensate for election...