I actually never knew about this. I assume he has talked about this at rallies before? Do you have a link of him discussing this, by chance?
Edit: So I'm not sure if Cuckconda was the one who downvoted me for asking this, but either way I decided to do some digging of my own and came across this interview Trump had with Washington Post in 2017. Starting at around 2 minutes in, he discusses where his idea for "Make America Great Again" came from and how it was independent from the Ronald Reagan slogan "Let's Make America Great." He also goes on to talk about his political aspirations and how he almost planned on running back as early as the 2012 presidential race.
I actually never knew about this. I assume he has talked about this at rallies before? Do you have a link of him discussing this, by chance?