https://www.reddit.com/r/Tesla/comments/3nfgqm/donald_trumps_uncle_was_the_mit_electrical_genius/
Even though it's three years old, it's hard to give any credence to this Reddit article because it mentions "George Herbert Walker Scherff Jr" as "the son of Nikola Tesla's assistant". There was a recent post hereabouts saying that Scherff was HW's birth name, and that he was adopted by the Bush family.
Couldn’t prove it by me either way. I just posted links to 3-4 interesting articles about Trump’s uncle and Tesla.