Well, I’m not a lawyer, so I’m not sure how they could work it, but, I suspect it would have something to do with an insurrection against the constitution by allowing our borders to be invaded by illegals, not knowing if there are people coming through who are intent on harm to the country, the harm is has on cities (New York is showing us this right now), and the people. Then there is the potential for possible criminal actions with Biden taking money from the Chinese government. That could be looked at as bribery, selling out our country and its secrets. The documents found at Chinese funded penn Biden center could be the medium for access to classified information in exchange for money. All of those could be viewed as a way to harm (rebel) or run afoul of our constitution (insurrection).
There are a few things that a court, lawyers, a Secretary of State, or an attorney general could work into a case for disqualification. Again, I’m not a lawyer, but I’m sure any savvy lawyer can make a case for insurrection based on those things..
Again, you all wanted the states to be able to determine these things, without trump ever being charged with insurrection, just that someone deemed it so, so, let’s just go ahead and play that game. 26 Republican controlled state legislatures that leverage over 270 electoral votes. Let’s get Biden tossed off the ballots in all of those states…republicans automatically win….unless you find another candidate to replace Biden, because he would be absent from all of those states.