Do you think Trump will really make America great again? And what does he mean when he says that?

This is what Trump keeps on saying that he'll make America great again but what exactly does he mean by that? What was America like when it was great? And what historical period was America it's greatest? Please be kind and accept diverging views and don't attack each other over it.
Do you think Trump will really make America great again? And what does he mean when he says that?
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