That kind of thing is not easily forgotten because it also means we have a president that is not always believable and we REALLY don't like that that.s.
But…but…I can’t remember the last time we had a president who WAS believable. Jimmy Carter, maybe, but only to his fans; the same with Obama (admittedly, had a lot of fans, me among them.) Reagan was mostly a glad-hander, IMHO, and Clinton betrayed his wife, so of course he would betray us. And then of course there was the ever-reliable Nixon..
My point is, it’s been a long time since there was a President that a large majority considered trustworthy or believable. We may not like it, but we’re used to it.