I would not worry if Romney and Mormons are pro US or not. Remember, Mormons are an American grown religion. Most others were brought in by immigrants from Europe and world.
I was remiss in not remembering that I am a geezer well into my 70s. Not everyone knows that Rockefeller-Scranton Republicans is "code" for internationalists -- at least IMO as I recall the 1964 election.
I had no idea that what I typed in would be thought a disparagement of Mormons. That was not my intent.