"Lawyers are trying to makes sense of what happened," said Christine Alden, an immigration attorney in Miami. "It’s all really far-reaching. It’s going to affect businesses, families and students going back to school," she said. The U.S. has treaties with some of the targeted countries that allow investors to visit the U.S. under the E-2 visa program, she said. Those people won’t be allowed to come run their businesses. Oil companies, tech companies and others that depend on foreign workers may see them stranded overseas."