You make the assumption there will be a new administration
Also, why do people think that Trump is so hurriedly building a new ballroom for the White House along with the bunker underneath? At some point it'll either be people giving in to Trump's administration or out-right civil war and that's why Trump wants a secure bunker and an armed militia (ICE) that is loyal just to Trump.
Even if people vote against Trump in sufficient numbers, he's not likely to accept that and leave.
However, if we look at the Nazi takeover of Germany, it seems that most people will just go along with it which certainly seems to be the case in the USA so far.