It screams fake news to me but it’s funny as hell!
I think the author would be shocked if anyone believed it was real and he didn’t intend people to think it was.
However, I do have to admit that I heard trump say directly to an ABC news questioner that he would and wanted to release his letter to Erdogan. That probably just inspired this funny hoax, doesn’t mean it is real.
If its actually real...well, its still kind of funny...