> Right. Nixon's forced resignation, on a credible threat that he'd otherwise suffer a bipartisan House impeachment and Senate conviction---either a singular event in US history---in no way whatsoever held him accountable, nor illustrated a threat to future Presidents
Well, no, you'll note I didn't say anything like that.
In fact, viewed alone, that would be a very potent blow for accountability; but impeachment and conviction on articles of impeachment alone is fairly minimal accountability, especially for a President (for, e.g., judges its somewhat more significant, as the ban on future public office is more significant for them than for Presidents.)
It would, however, be significant for Presidents because it opens the door for immediate criminal accountability, but this impact is neutralized when we establish that even the consideration of criminal liability of the President for actions committed during the term of office, even those high crimes and misdemeanors so serious and well established that they certainly would have resulted in impeachment and conviction, is outside the scope of what can be considered.
