I guess I didn’t make myself clear. It is a really bad idea to even “guess” publicly.
Whether we guess right or wrong, we create a lot of trouble for the person we have named as Q. So, I won’t do it.
But, I will tell you how I came to my conclusion. It has to be someone very close to Trump, There aren’t that many in such close proximity. Then I considered the background of these few, what skills they had, what “employment” experience they had.
You can go with that, and reach the same conclusion I have, but I implore you not to “publish” anyone’s name. After all, we could be wrong.