Trust me, I am no fan of snopes and didn’t much like using that as ‘proof’. I’ve seen articles of theirs that gave wrong or biased conclusions. However, this one seemed to be accurate in that there doesn’t seem to be any proof that Reagan predicted his presidency.
What they did miss, however, is there are articles about Trump talking of meeting Reagan. He indicated that had mutual respect for each other among other niceties. - The quote does sound like something Reagan would say, phrase wise. Trump’s first wife also says ‘Reagan or someone’ sent Donald a letter in the 80s encouraging him to run for office. So it is possible... its just unfortunate that there is no proof of that quote. (Errr, And President Trump didn’t endorse that quote, right? Although if he did, that would be proof enough for me.)