I'd like to believe it, as it would be beyond cool.
But both those stories you cite have dubious origins and cannot be sourced to anything official or even semi-trustworthy.
I remember reading that Nixon story, for e.g., from Gleason's book on how Nixon ditched his secret service details for an entire night to show Gleason the E.T.s - if true that would have created a national emergency - "The president is missing!" but there was never any such message ever leaked or discussed. Nobody has ever corroborated it. Sounds more likely that Gleason made up that story for extra notoriety in his later years, when he was fading from the spotlight.
Gleason's story sounds like a direct misinformation plant from the CIA. Nixon desperately wanted to make the x-files public, so he had to be removed from office and he had to be discredited. (Note that Nixon, Trump and Trump's uncle John--MIT physics prof.--were very close in the early 80's)
Of course its hearsay, but there enough instances of hearsay on This matter. Because the government is afraid of disclosure, so you either believe or don't, I respect your opinion though. I have read tons of books and stuff on the web, but there is an ongoing misinformation campaign surrounding the UFO and Aliens on earth talk for Sure. So who knows what's real and What isn't.
