I'd like to think that before Jan 6, Trump will declare war on China for their repeated attacks on us (WuFlu, cyber, election, whatever the fuck is going on in Canada with their troops). At that time, he will also declare that everyone working with China is an enemy combatant and will be arrested and sent to GITMO.
Cue the mass arrests among the legislative, judiciary, and government agencies, to start. Now, the only people left in Congress are those Patriots who did not sell out to China. It will be a smaller group, and much more likely to meet Jan 6 and contest the election results.
Trump calling for rally/protest/demonstration of the MAGA forces for the same day is to ensure that those in Congress who remain will vote patriotically, or face the Wrath of the MAGA just waiting outside.
That's just my two cents.