Stolen From Rambo
Like Will Hunting (Matt Damon) stole Sean's (Robin Williams) line in Good Will Hunting tRump stole from Rambo (Rambo First Blood Part II - "...I'm coming to get you!" . While it was possible the former could follow up on his declaration it is not likely tRump will succeed in his efforts.
I think he was trying to sound tough by emulating Stalone's rather recent in time character.
I loved Rambo II. "Murdock... I'm coming to get you."
I don't know how I can remember stuff like this. Movie clips I can quote almost verbatim.