Trump’s new attempt to restrict birthright citizenship even after the Supreme Court loss highlights the administration’s drive to limit who can become an American. Although there’s no official estimate of how many births can be considered “birth tourism” cases, experts say Trump’s approximation is exaggerated. “What we’re doing is taking legally validated means that are clearly within our disposal and targeting them to this birth tourism industry. There’s absolutely nothing here that runs afoul of any of the Supreme Court rulings on the subject,” Sharf said. Advocates against the proposed changes said they believe the constitutional amendment and Supreme Court decisions will again stop the administration’s efforts to restrict birthright citizenship.