I think it takes legal challenges. 2 lawyers from the Federalist Society wrote an indepth study claiming Trump can't run under the insurrection clause of the constitution and the former co-founder of the Society concurred
All suggested legal challenges to keep him off the ballot. The paper also urged state secretaries of state to simply not out his name on the ballot. If enough blue and swing states did this he could not even 270 electoral college votes.

Anyway enjoy your articles