I wondered about this so checked what happened to Joseph McCarthy. He was subject to a vote of censure in the senate, and became unpopular, but that was it. Of course he died shortly after of alcohol related conditions, so there's that..
The relative lack of consequences there enabled this go around.
With Reagan and Iran-Contra, Reagan was never charged, most officials were pardoned, and only one person served any jail time.
With Bush (43) there were no consequences for any of it. Not he war under false pretenses, not the domestic spying, not the torture.
And with Donald Trump (45) a single judge recently appointed by Donald Trump held up legal proceedings until he was elected President, again.
Yes. That's deeply bad precedent.
Roger Ailes founded Fox News, explicitly, to avoid a recurrence of even that minimal level of consequence.
He was threatened with impeachment for lying about it after he found out it had happened.