"Impeachment is a political process, but it has a legal frame of reference... [O]ne of the things we try [very hard] to do in our book... is explain how law and politics interact in this process, and... if you forget the political side, you're going to make a terrible set of blunders. But if you ignore the legal side, you're going to risk destroying the Constitution and the country. I agree, from a strictly partisan, political point of view... that letting Trump basically do himself in and make all kinds of terrible blunders, (and there seems to be a new one every day with this crazy pardon or a completely weird imposition of a tariff that will lose American jobs) that he will make things worse and worse... for himself. But the Constitution we have is a fragile device and if in the course of doing that, he defies judicial orders... He says he might defy an order to submit to a , which would be a first in American history... basically presidents are subject to subpoena, but if he is subpoenaed and as his lawyers said in a memo... he says "No, the president is above the law, above the subpoena power." Then, even though it might be politically wise to just do nothing, we would be breaking faith with the constitution to essentially go back to a system where someone is king. ...Tyrants don't easily give up power, and if we simply let this guy get away with anything, and say, "Let's wait til 2020." It may be too late by 2020 to restore a constitutional democracy under the rule of law."