To Go Baroque here ... and point out the irregular pearl of it all. A pearl we create for we can not metabolize irritants, and to remind everyone politics is the strugle for profane power (and dozens of other things), and there is not ecclesiastical certainty of the end times. Thus we can't justify the end goals, while we debate the means. We are not all knowing, thus we must mourn.
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Why do we think Trump will get a fair trial, and due process? I am willing to bet there is no jury of his peers that will not bring politics into this. And with our system of laws a hung jury, 1 juror out of 12 (though what ratio is different in different jurisdictions) can be a Trump loyalist who understands all the facts given to her, him, or they and such a person can just not care for they are a true believer.
So what I am saying is congress, the executive, and the judiarcy can not just past the buck to a local or federal prosecutor and merely pray that will be enough. There is no ecclesiastical certainty, for justice is not always done, and what is justice is up for debate!
Every path is fraught, that is life Other nations have prosecuted former leaders whether governor, prime ministers, and presidents, and perhaps the US can survive it, and perhaps we can not. Likewise perhaps we can not survive doing nothing. And survival is not the only perversity in this ethical play.
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I am reminded of the 18 rules of complex systems, the essay by Richard I. Cook, MD "How Complex Systems Fail (Being a Short Treatise on the Nature of Failure; How Failure is Evaluated; How Failure is Attributed to Proximate Cause; and the Resulting New Understanding of Patient Safety)"
https://www.adaptivecapacitylabs.com/HowComplexSystemsFail.pdf
There is no singular cause for things, causes are over-determined and over-coded due to the power of repetition and the limits of language. The world is complex. People should stop thinking of social systems in Newtonian physics with a single cause and a single effect, no the world is much larger than that.
We must accept the miracle of life and all its horrors, and then after this acceptance choose to act or choose to not act. shrug