There are many ways to explain with different facts about the man that he is unfit to be POTUS, but there is one way which will scare all of us and most perplexing not enough American voters could decide that it was so.
Read the well repeated facts the Economist shared regarding this buffoon,
He is, however, notoriously thin-skinned and unable to stop himself responding to any perceived slight with vicious (verbal) attacks of his own. He also revels in braggadocio and is known to be reluctant to take advice. Marco Rubio, a rival for the Republican nomination, questioned whether he had the temperament to be put in charge of the nuclear codes. So did Hillary Clinton. They were right to do so. But it is now Mr Trump, not them, who takes the biscuit.
And the magazine forgot to mention what Obama said about him. His campaign took away his Twitter account because he couldn't control himself. Now you can't take away the biscuit that would launch the nuclear missiles.
This is so dreadful we cope by not thinking about it but who knows in the next few years there would not be scary moments when we are forced to look into the bottomless pit.
This damage to America's credibility is going to be very hard to repair. If you cannot be counted on to put a safe pair of hands to watch over these doomsday weapons, we must figure a way to solve it without you.
Update: Nov 20 8:50 pm
I received this as an email from YouTube and discovered Warren Buffett also identified the nuclear war risk as the defining test why Trump is unfit to be president. I had earlier referred JG to it as well.
Yes, Buffett also offered the same reason I gave too whenever people ask me to defend why Obama is one of their greatest presidents. The American voter is perverse but their founding fathers had expected them to be. However these great men did not think how America would impact the world and us.