This slogan is essentially a Rorschach blot for idiots. It’s a bumper sticker slogan for people who feel uncomfortable thinking for more than 10 seconds at a time. Its designed to lure in all the people that can’t stop thinking about that one night stand they had 30 years ago, but can’t seem to remember that was when they picked up a lifetime of herpes. Just break it down:
“Make”: There is some action that can be done to accomplish our goal. Implies we haven’t been doing it yet, or that we were doing it and we stopped.
“America”: Wild card. Does this mean American military, culture, economy, society or something else? Unclear, so choose your own adventure here.
“Great”: So subjective as to be meaningless. Greater than all 195+ other countries? Better than some metric has ever been in American history? Just an improvement on current conditions?
“Again”: The only word whose meaning can be nailed down. At some point in the past we achieved whatever goal we should now be working towards (again). But still plenty vague so that you choose any time you would like.
Mostly it seems like you can break “America” into 3 broad categories.
Military Power: The US is unquestionably the largest spender, has the broadest force projection, more than adequate nuclear deterrence and still maintains an overwhelming technological edge on all other nations. Where we have become weaker is that we are great at winning battles while still losing or at best stalemating the war. Overwhelming force leads to persistent asymmetric/guerrilla warfare, and our reliance on technology has the potential to be an Achilles heel for hackers and foreign powers to exploit.
Economic Power: Still the wealthiest nation by GDP, so not much room for improved greatness there. As others have said, most of the economic problems people are feeling have to do with functional capitalism maximizing profits without regard for people. ‘Fixing’ the economic conditions of the little people would require a huge injection of government controls and regulations and have a risk of either not working or actively backfiring. But if you remember that corporations are people too (my friend) then maybe we can all feel okay about things. After all, record highs on the Dow must mean something is great, right?
Society/Culture: The most subjective section of all 3 and no surprise, where there is the least consensus. Most Trumpettes have ideas similar to Flyer; America was greater when women stayed in the kitchen, blacks kept to the back of the bus, gays remained hidden because they rightfully feared for their lives and when somebody smacked some goddamn sense into that long haired boy.
I suppose that if your moral code allows the ends to justify the means then you might be happy having the government telling you who you can love & marry, what lunch counter to use, what you can do with your body and what you can believe, as long as the government says the default/correct option is white, straight, male and christian. But don’t act all surprised when people who don’t fit that mold don’t consider your changes all that ‘great’.