Your government design and allocation of power made it so one person could do this. Trump is simply the first to flaunt the social contract this brazenly. There was no lock on the door, only a verbal agreement not to go through it.

Once this is done, once Trump is deposed the fight will not be over. Measures must be enacted to make the systems safe so that another Trump can’t do this ever again. The system is just as liable for this happening as the man himself. We need to stop thinking in terms of singular bad actors and recognize faults in system design because otherwise it is just a waiting game for the next bad actor to do just as bad or worse.