President Donald Trump’s new “Buy American and Hire American” campaign is off to a promising start. At an event at Snap-on, the tool manufacturer in Kenosha, Wis., he promoted his executive order that assigns the Homeland Security, State and Labor departments to draft H-1B visa reforms.

The order’s goal, as Trump emphasized, is to ensure that the 85,000 employment-based H-1B visas (65,000 from the general pool of foreign nationals and 20,000 from the advanced degree exception category) are issued to truly skilled overseas workers, and aren’t used as a vehicle — often fraud-ridden — to displace American engineers or deny them employment opportunities.

The H-1B has been a thorn in U.S. IT engineers’ sides since 1990 when Congress created it. For 25 years, Silicon Valley, many in Congress and immigration lawyers have insisted, without evidence, that the H-1B is essential because an acute shortage of qualified Americans forces employers to import labor.

Another key talking point that H-1B proponents advance is that more immigration translates into more innovation, and boosts entrepreneurship. However, a look at Census Bureau and Bureau of Labor Statistics data contradicts that theory. During the last three decades, the foreign-born share of the U.S. population hit a record 13.7 percent in 2015, while the rate of new business creation declined 35 percent.

Despite rhetoric about the essential role the H-1B visa holder plays in today’s America, 13 of the 15 top H-1B visa applications filed with the Labor Department are global outsourcing companies that pay lower than the prevailing wage, evidence that employers make no serious effort to hire Americans.

A wealth of research done during the last few years, some of it by Democrats and liberal-leaning think tanks, found that no IT shortage exists and that the H-1B depresses wages and displaces Americans.

Ray Marshall, labor secretary under President Jimmy Carter and author of Value-Added Immigration, called the H-1B “one of the best con jobs ever done on the American public and political systems.”

Marshall further said that no shortage of college-educated workers exists, and that employers pay below the market rate for H-1Bs. In his book’s preface, he criticized the federal government for its failure to develop a guiding national economic policy to regulate the flow of immigrant workers.

The Economic Policy Institute, which promotes policies to improve low- and middle-class American workers’ lives, has written extensively on the H-1B, and reaches the same finding each time: H-1Bs have no positive effect on wages or on innovation, and make American workers disposable.

Similar research from the U.S. Government Accountability Office, the Treasury Department’s Office of Tax Analysis, University of Notre Dame, UC Berkeley and the Los Angeles Times arrived at the same disturbing conclusion.

Studies can’t analyze the emotional impact on workers of losing their jobs, and having to train an H-1B replacement, insultingly called “knowledge transfer,” to receive their severance pay.

Trump is right to tighten the too-lax H-1B standards. He was elected because of his platform to put Americans first. But if he wants to make his promise to protect Americans workers a reality, a better solution is to put the dozens of employment-based visas on a temporary moratorium.

Wage-earning Americans’ best friend is a tight labor market.

— Joe Guzzardi is a senior writing fellow for Californians for Population Stabilization (CAPS) who now lives in Pittsburgh. He can be reached at joeguzzardi@capsweb.org, or follow him on Twitter: @joeguzzardi19. Click here to read previous columns. The opinions expressed are his own.

Joe Guzzardi is a nationally syndicated columnist writing about immigration and related social issues. A California native who now lives in Pittsburgh, he’s a Progressives for Immigration Reform analyst who can be reached at jguzzardi@pfirdc.org. The opinions expressed are his own.