My question is inspired by the hypothetical actions of some of the recent insurectionists, one of whom was pictured below:
At least 2 men raiding the Capitol bought restraints with them, as if they were preparing to take hostages.
Now this didn't eventuate, and we wont know their motivations for a while, if ever (they may have wanted some human shields, they may have been planning executions, or worse unspeakable things). But combining this with what was happening on the floor and Trump's rhetoric at the time, a crazy plan seems to emerge where they weren't hoping to just delay Biden's confirmation, but actually hold politicians hostage until they made Trump president.
Now this seems like something out of a bad action movie, but I also understand that the US constitution and procedural laws formalised many of these processes - x must occur on day y by process z - leaving little room for "we need to retake the vote because half to room was under duress" style concerns.
So if this insurrection plan succeeded, far fetched as it was, and they got everyone to say the right words to make Trump "win", how would that mess be cleaned up politically / legally?
How do you invalidate a congressional decision due to duress?
(If there is a "undo last action" ability of Congress, or "person A was out of position, therefore everything was invalid" ability, that sounds like it could be abused in the course of normal politics. Trump still has allies in Congress so such corrective action wouldn't be unanimous - some politicians would object to reverting the outcome)