How is trump an authoritarian? You mean his desire to get the illegals out of the country?
Maybe its just the way he comes across but his attitude is similar to Barack’s in that HE is going to make things happen and He is going to make America great.
I would say its WE Americans who will make America great if the government gets out of our way.
As to the invasion on our southern border GW Bush signed a law to make a fence. It was partially built
The congress (in the hands of Democrats ) quit funding it...
I think all Trump needs to do is remind people of what is already on the books and propose to do do what all Presidents are sworn to do which is enforce the laws.