I believe America has always been great, just never perfect. A work in progress. The Daily Show on Comedy Central did a funny bit ( video below) on the Trump line of making America great ...again. Just when was that time they asked GOP convention goers? No clear consensus.
We've come a long way and we have a long way to go, but the Trump message of dystopia and fear is not the way forward. Most of what he says is either self centered or plays on the fears of his base who ride on every word and hand gesture.
In today's Sunday Monitor, they compared Trump's convention speech with that of Richard Nixon way back in 1968, arguably one of the most divisive times in our history. This one paragraph from Nixon's speech is in stark contrast to Trumps: “The time when one man or a few leaders could save America is gone. We need tonight nothing less than the total commitment and the total mobilization of the American people if we are to succeed. Government can pass laws but respect for law can come only from people who take the law into their hearts and minds and not into their hands.”
These words from the movie " The American President" states it well: ( note that I substituted Donald Trump for the character in the movie)
"We have serious problems to solve, and we need serious people to solve them. And whatever your particular problem is, I promise you, Donald Trump is not the least bit interested in solving it. He is interested in two things and two things only: making you afraid of it and telling you who's to blame for it. That, ladies and gentlemen, is how you win elections"