I have been giving this more thought.
If the head of the GSA (and presumably her family) were receiving death threats (and I felt they could not be managed successfully), I would have ordered her to take a leave of absence from the job and declare the position vacant.
I would then appoint an acting person after I put them and their family in protective custody (and only after they had agreed to handle it, fully understanding the risks).
Then I would have refused to act to allow any transition activities until all issues on the Presidential election were resolved.
My opinion—fwiw.
Good point. It’s not the GSA under the Executive Branch? President Trump should have furloughed every last administrator. On full salary of course.