This is a quote from an excellent article by Vox. The article is a summary and commentary upon a very recent interview US President Donald Trump gave to the NY Times.
Please go read this article here
The Vox article describes a man who has lost at least some of his cognitive ability. The interviewer allows Trump, in his own words, to prove himself a man unfit for the office he holds. Donald Trump is not just a liar, but delusional, not just inarticulate but incoherent. He is willfully ignorant and authoritarian in a job where his power is absolute. If he was on the Apprentice, he wouldn't be able to deliver his lines and it wouldn't matter because his choices would be confined to the arena of celebrity. The fact that the President of the United States has lost his marbles (no offense to all other sufferers of cognitive dysfunction) is terrifying. Doing nothing about it is shameful.
Thus, this article. Do please at least make yourself aware of that which you are not aware.
Don't be like Donald Trump. Don't let America suffer from the Dunning-Kruger effect.
You don't know what it is you don't know. Don't pretend to be an expert about that.
What you know compared to what you don't know could be expressed in the same ratio as the amount of time you are alive compared to the infinity before and after that.
How the hell is Donald Trump still President?