I think that's what they're worried about. He has nuclear codes and since he's not attending the inauguration of Joe Biden they're thinking he may incite another storming at that ceremony by his followers. This time security will be high and hopefully the FBI have arrested them by then as well. The officer that you might have seen on the news being crushed in the doorway is expected to survive but will be healing for awhile from his injuries.
The impeachment process may run past the inauguartion but they are making sure that is accountable for his action and pays the consequences of his actions and not be able to run for President again. That is important.
Faraway