I think a single quote from Trump is enough to label him evil. When accused of rape he didn't say I would never do such a thing, he indicated she wasn't hot enough.
Then again, maybe I just have different standards.
It's not a bad idea to split hairs over this, but a definitive meaning for the word "Evil" could be explored with a tool ordinarily not connected to moral issues, but applied in "good government".
Add up the number of people Trump has hurt in some way since the inauguration, and perhaps in some cases -- you can apply a dollar value to determine an expected value. Start with the 350+ Courier folks whose continued employment was promised, then terminated after they'd made their plans and even expenditures toward the Holiday Season. Count the number of children hurt -- even psychologically -- in Trump's border fiasco. Add in the number of civil servants whose lives were turned upside down for several months as Trump held their pay hostage in his extortion attempt with Congress over the "Wall".
You could extend this further to damage done to National Parks and Forests, environmental damage done by promoting mining projects such as that in Alaska, promising great risk to an important salmon spawning ground and the people there who depend on it.
Those are the costs. Add up the marvelous truly verifiable benefits that President F***stick has bestowed, not just on his Base, but upon all of us. Think hard.
Then, ask yourself again whether the most disgusting person ever to appear on TV since the 1936 Berlin Games is "Evil". Consider also all the damage he's done to the "secular State" -- a separate concept of morality that includes things like risk to National Security, the smooth operation of government by non-partisan careerists. Consider the damage he's done to our reputation around the world, our relationship to long-standing allies, such as the "Five Eyes", the damage done to other countries in Europe or the risk to them, like Ukraine, just things in general such as the anxiety Trump has caused in free Asian countries over his little Man-Crush with Little Rocket Man. And I mentioned the unwarranted slaps in the face to hurricane-ravaged Puerto Rico.
The man is an Evil Piece of Degenerate Filth. But he's no "stable genius" -- first, because he's not stable, and second, but for some few areas of his experience and practice, he's barely a mediocrity for his low-IQ reading skills, his inattention to facts, his ignorant understanding of history, and especially his ignorance of American government.
Ya hear that, Trump? Ya hear? For somebody who secretly wants to be loved to an extreme, you are a degenerate, criminal, un-American piece of Worthless Shit. The human race will be better if you and your spawn are wiped off the planet. So either vacate the White House, throw up your hands if Congress impeaches you, bow out gracefully if you lose the election . . . . or blow your own brains out on Sesame Street after shooting Big Bird to chart a new course in history. Or just wait long enough, and go down for the dirt nap by someone else's hand.
Go back to your Father in Hell from whence Ye came.