U.S. President Donald Trump has signed an executive order directing federal agencies to propose changes to the H-1B program. The program is used to bring highly skilled foreign workers to the United States. Trump signed the order called “Buy American, Hire American” during his Tuesday visit at an American company in the state of Wisconsin. During the presidential campaign, Trump had promised to change the country’s immigration policies. A senior Trump administration official says the order calls for the strict enforcement of all laws governing entry into the United States of labor from abroad. The order directs the departments of Labor, Justice, Homeland Security and State to take action against fraud and abuse in the immigration system to protect American workers. It also directs the departments to propose reforms to ensure that H-1B visas are given only to the most-skilled or highest-paid applicants.