With enough pressure, the white house can get congressional Republicans to do what trump wants. They will say the election is fraudulent and that will be enough to get congress in line

The thing is they can't lose more than a few votes on the question of "end the country and plunge each side into civil war" to do this, maybe they get there but also the new congress could meet e.g. in philadelphia and, constituting a quorum of the house, make a legitimate claim to power

You arent wrong but to modern Republicans the actual logistics of holding a position are irrelevant