You ought to look up the term "Fascist". Here, I've done it for you:

often capitalized :  a political philosophy, movement, or regime (as that of the Fascisti) that exalts nation and often race above the individual and that stands for a centralized autocratic government headed by a dictatorial leader, severe economic and social regimentation, and forcible suppression of opposition
2
:  a tendency toward or actual exercise of strong autocratic or dictatorial control <early instances of army fascism and brutality — J. W. Aldridge>

No, he's not all the way there yet, but any reasonable person can see how quickly it could happen.

Trump is paranoid, narcissistic, sociopathic, dictatorial, mercurial (to say the least) and often talks in a florid, fantastical manner. In sum, he's not got a grounded intellect capable of acting in a measured and thoughtful manner. He's a natural-born demagogue with very little in the way of empathy.

He is a danger to life on earth.