The USA’s greatness came from a constitution acknowledging inherent individual liberties. Trump doesn’t even understand that, much less promote it.
Your first sentence is part of the reason America was great. Your second sentence has no basis in evidence and the fact that Trump wants to go back to great is evidence your are wrong about Trump’s understanding or what he promotes.
Tump's stated top three responsibilities for the US government: "Security, health care, education".
I rest my case.