In 2001, Donald Trump’s third wife, Melania, was granted a green card for permanent US residency under the EB-1 visa nicknamed, “the Einstein visa.” At the time, she was an unknown model in Europe. To qualify, she needed either a major award (i.e., Pulitzer, Oscar, Olympic Medal) or extensive documentation of “extraordinary ability in the sciences, arts, education, business, or athletics through sustained national or international acclaim.”
The visa allowed her to sponsor the legal residency of her parents who are now close to gaining US citizenship. Donald Trump used “chain migration” as a huge part of his anti-immigration campaign platform stating, “CHAIN MIGRATION must end now! Some people come in, and they bring their whole family with them, who can be truly evil. NOT ACCEPTABLE!”
Full EB-1 requirements listed here: https://www.uscis.gov/working-united-states/permanent-workers/employment-based-immigration-first-preference-eb-1
Just five immigrants from that country obtained legal residency under the EB-1 program the year the first lady received her green card.