Melania Trump on Sunday celebrated what she called a “personal milestone,” but a former pal was quick to point out how Donald Trump would do his best to undermine it if her were to become president again. The former First Lady over the weekend took to social media to celebrate when she became a United States citizen years ago. “Becoming an American citizen is an achievement that inspired my ongoing commitment to this great nation,” Melania said Sunday. “Today marks the 18th anniversary of this personal milestone.” Want more breaking political news? Click for the latest headlines at Raw Story. …