I mean to set aside... the complex superstructure of rules, doctrines, standards, legal tests, judicial precedents, legislative and executive practic… - Laurence Tribe

While "high Crimes and Misdemeanors" was a term of art dating to 1386, and had thus accumulated centuries of intellectual baggage, there's no reason to think the Framers had all that in mind.

There have been impeachment talk... about Truman, Jackson... even about Jefferson, but the really serious efforts in our history have been efforts after the Civil War, beginning with Andrew Johnson and then continuing with Nixon and Clinton and now perhaps... Trump.

Governmental subsidies to "major" political parties... or failure of state governments to provide funds to compensate school districts lacking "rich" property tax bases, are government actions that affirm some aspects of the status quo as inevitable. Such... are at present constitutional... Unable to support a challenge to such... power, a truly procedural... theory seems doomed... for without such challenge government may well be able to shape the "will" of the governed in the image of those who govern, reducing consent and representation to all but empty ideals.