Possibly, probably. But there's zero indication current direction will change.
Extrapolating from current events, it's more likely that the US will have a different system of government in four years than a different president.
Do you mean when the current POTUS is attached as VP and then the newly elected POTUS steps down to elevate him to a third term?
No.
I'm not sure the FBI will even exist in four years. It only takes an Elon Musk investigation leaking to Twitter and his minions can just defund the police.