Registration for the H-1B visa lottery closed last week. The tech industry has long been the biggest beneficiary of this program for specialized workers. But uncertainty has been spreading due to the Trump administration’s restrictive stance on immigration policy. Even legal immigrants have felt the crackdown. It’s led some companies to advise their H-1B holders not to leave the country for fear that they could be barred from returning. Marketplace’s Meghan McCarty Carino spoke with Gerrit De Vynck, who wrote about risks to the visa program for The Washington Post.