Under his presidency, Trump assured the crowd, that will change.
Here's a look at how Buy American provisions work, what the White House intends to do and what it all might mean for government contracts and the taxpayers who finance them.
WHAT IS 'BUY AMERICAN'?
The Buy American Act of 1933 gives U.S. contractors a preference in the awarding of federal contracts. Additionally, the Surface Transportation Act of 1978 requires that American-made iron, steel and other manufactured goods be used when federal dollars pay for highway, aviation, rail and other transportation projects.
SO WHAT'S THE WHITE HOUSE'S COMPLAINT?
Government contracting "is a highly complex area, with lots of exceptions and exceptions to exceptions," says Stephanie Harden, a lawyer specializing in government contracts at Blank Rome LLP. Government agencies can bypass U.S. suppliers, for example, whose bids come in too high or if the required goods and services aren't available domestically. Under several free-trade deals — including the World Trade Organization's Agreement on Government Procurement — contractors from 59 countries have the right to be treated the same as U.S. companies when it comes to many federal contracts.
But the White House says that such exemptions have gone too far and that U.S. contractors are unjustly losing out. The U.S. Government Accountability Office, a federal watchdog agency, reported in February that under the WTO procurement agreement, foreign companies have gained far more access to U.S. government contracts than American companies have gained to overseas government contracts.
"These rules offshore our tax dollars rather than investing them to create jobs and innovation at home," says Lori Wallach, director of Public Citizen's Global Trade Watch, a critic of U.S. trade policy.
WHAT DID THE PRESIDENT'S ORDER DO?
Not much — at least initially.