An earlier answer pointed to the fact that Trump, seemingly, thinks America was great under President Theodore Roosevelt. Did Trump ever state his opinion of Theodore Roosevelt? Both as a personality, as well as Roosevelt's complicated and nuanced views?
Ironically, I just finished listening to a a neat "History on Fire" podcast about Theodore Roosevelt, which highlighted just how nuanced his views were, on pretty much every conceivable topic.
It's impossible to prove a negative, but it does not appear that, as of this writing, Donald Trump has ever said anything publicly about Theodore Roosevelt.
There are dozens of articles comparing Donald Trump and Theodore Roosevelt, and not one of them has mentioned Trump's general opinion of the 26th President. As the question you pointed to suggested, he seems to have indicated that that was a period when America was great, but has not elaborated further on the president himself. I figured if he had said anything, that would be a quote in several of these articles, but its absence suggests he has never publicly said anything.
