He said one will limit the number of people eligible for U.S. citizenship after being born in the United States. A second order seeks to curb what Trump called “birth tourism” by increasing restrictions on visitors to the U.S. who want to obtain visas to give birth while in the country. The executive order was blocked by several lower courts and never took effect. In June, the Supreme Court struck down Trump’s order by a 6-3 vote. But the vote was too close for many immigration advocates and legal observers who felt the legal question of birthright citizenship was a long-settled issue.