I think that is highly unlikely.
Anyway, a documented attempt at visiting Roswell was made by President Eisenhower and later Clinton. They were both deterred. I wasn't going to go into the whys, I can't talk about something I don't know. By their own word, they were rejected for whatever reason. We can leave the reasons and still say; if you hold office 5-10 years, you can't see/know everything.
I wasn't aiming at the "alien" part, but the "forbidden" part. Since the POTUS is also the CIC, this is even more interesting. It's obvious why they wouldn't let me (they probably even know I lived in Iran, so hey, double-trouble), but to restrict the visit from CIC... people often wonder why. I think Trump being president explains that.