You need to paint a picture as to the consequences of having an authoritarian holding the office of the presidency. Listening to your radio program today, I understood what you meant and the dangers of authoritarianism, but I'm afraid the label may have just 'gone in one ear and out the other' for too many of your listeners.
With Trump we are facing a perfect storm of egomania, rice paper thin skin and authoritarianism. With the egomania, I believe the term holds not just in its common language sense, but also from a mental health perspective as well. By that I mean he suffers from a form of mania, where the whole world for him revolves around his ego. He will therefore say or do whatever is necessary to inflate, protect and feed that ego in the same way that a drug addict or gambling addict will have a mindset of only caring about one thing with disregard of every other aspect of the rest of their lives -- feeding that addiction.
Right now Trump is merely saying whatever he thinks he needs to say to win the popularity contest that will get him what his ego desires -- the Presidency. But once he is in office, that is when the danger begins where he could well abuse the powers of that post to further his ego addiction. I'm envisioning a nightmare scenario where he will surround himself with yes men and then start ordering the arrest of any and all that pose as obstacles and dangers to his hypersensitive and ravenous ego.
I think we all need to realize that the office of the presidency and any safeguards to the abuse of power in that position are not mechanical safeguards that will physically prevent the abuse of power. The balance of power and political structure of our system of government is much more delicate and vulnerable than most people realize. Anyone who thinks differently should look to the time immediately after the attempted assassination of Reagan when Alexander Haig illegally assumed control of the powers of the presidency and did so successfully, albeit for a short period of time. As short as the Haig presidency was, it should have been immediately stopped as soon as he tried to start it -- but it wasn't.
What the Haig example shows is once someone assumes power and start to abuse that power, it requires regular humans to step up and stop that abuse even if there are already people in an administration that are not loyal to that person abusing their power. Now, imagine someone like Trump who has surrounded himself with people that will always agree with him and he starts ordering the arrest of members of the press and and congress that pose a threat to his ego. What or who is going to stop him once those orders get into the hands of law enforcement officers whose careers are built on always, without question, following orders?