Just how do i know that photo you used isn't a total photo-shop.
I don't think it was photo shopped because I remember it was published in quite a few mainstream articles back then. Also, supposedly Melania is 5'11" and trump is 6'1" so there's really only a 2" difference in height between them.
If you can expand the picture of the "fake" Melania on your computer, you can actually see her eyes behind the sunglasses which look quite a bit different than the "real" Melania's. I have no problem if they used a body double but I agree with you, they could have found a better match.