President Donald Trump has signed an executive order to review a temporary visa programme used to place foreign workers in high-skilled US jobs.
The order directs agencies to enforce government rules on excluding foreign contractors from bids for government projects.
He signed the so-called Buy America, Hire America order on a visit to a tool factory in the US state of Wisconsin.
The order is aimed at fulfilling his "America First" campaign promises.
But it falls way short of Mr Trump's campaign pledge to end the H-1B visa programme.
Mr Trump will direct the departments of State, Justice, Homeland Security and Labour to propose reforms to the scheme, which allows American employers to bring foreign workers to fill US jobs.
"With this action we are sending a powerful signal to the world that were going to defend our workers, protect our jobs and finally put America first," he said at the Snap-On Inc headquarters in Kenosha, Wisconsin.
Mr Trump's wife Melania used an H-1B visa in her early days as a model in New York, says the BBC's Gary O'Donoghue in Washington.
(Published by BBC - April 18, 2017)