Of course they can and do so with great regularity!
The fact that the very fact that they
regularly abuse power in our day of tyranny and then hide behind the 5th Amendment
with great regularity is a serious legal matter. I would go so far as to say it amounts to
novel but
obvious grounds for a court fight to strip government officials of a right given to private citizens, a right designed to protect them from an abusive government.
I think that the SCOTUS would love to rule on a landmark case like this one. (I certainly would if I were on the Court.)