Are we speaking of different things here? Is an “institution” like the US Department of Justice or its Supreme Court different from an “institution” such as the legal and constitutional ethos of Enlightenment-era individualism that is supposed to motivate their actions? Perhaps the former can bend, buckle, or break, while the latter survives.
And perhaps not. Definitely, to an outsider, the broad independence that has usually been the remit of an attorney general in the US is remarkable, almost incomprehensible. A politician or lawyer from the President’s own party is appointed by the President to head the Department of Justice and is a member of his Cabinet — but from that moment on is supposed to make decisions without the interference of the President. Such an inversion of basic incentives can persist only when some sort of institutional strength has been built up, both in terms of departmental processes or their underlying ethos. Attorneys general in the past have refused to fire special prosecutors investigating the President — for example, during the Watergate scandal — and been fired themselves for this defiance. Much more recently, the current attorney general very conspicuously took his time about prosecuting Mr Trump. His party might be paying the price of his punctiliousness. It is hard to see how such care would be taken to preserve institutional independence and objectivity in the next four years — and, if not, why it should ever return.