As an European, I don't quite get what people are complaining about, Trump is doing what he said he will do and has a mandate for it. Of course the Democrat university professor will try to rally up people.

We have a separation of powers for a reason. This is throwing out the main power entrusted to our Congress. Why would any future administration care about what Congress has to say after this precedent is set?

He also doesn't have a mandate, he won by relatively thin margins just like all of our recent elections.

If they want to do this and not destroy our democracy, they just need to pass a bill to make the changes they want.

> has a mandate for it

He certainly has no mandate for anything. He only barely won.

Is the typical presidential win much more substantial?

Yes. This is the slimmest margin of victory since at least Lyndon Johnson in 1964.

Do you mean the margin presented in the table here: https://en.wikipedia.org/wiki/List_of_United_States_presiden...

And how does one come up with sufficient margins for the president to do any given thing?

gleeful displays of cruelty and obedience

will age like black milk

https://en.wikipedia.org/wiki/Todesfuge