Trump's 'America First' Agenda Marks Sharp Break In U.S. Economic Policy04:01

President Trump and his advisers have begun putting some red meat on the bones of the president's "America First" agenda.

Trump is expected to talk more about that when he addresses a joint session of Congress on Tuesday night. As with Brexit and other nationalist movements, Trump sees his election as part of a broader rejection of globalization.

"Erasing national borders does not make people safer or more prosperous," Trump told supporters in Melbourne, Fla., this month. "It undermines democracy and trades away prosperity. We're giving it away."

That philosophy not only guides the president's policies on immigration and national security, it is also steering an economic agenda that plays well with many of Trump's most ardent supporters.

"A lot of people here are pro-America and looking to support a president that finally says, 'I'm for you, the working man,'" said rally attendee James Evert. "His No. 1 concern is Americans. Not for all the other people around the world."

But turning nationalistic slogans into practice is easier said than done, as Trump discovered on one of his first days in office. During a discussion of restarting two stalled pipelines, Trump insisted his commerce secretary look for ways to include more American materials.

"It comes from the United States or we're not building it," Trump told an audience of conservative activists last week.

The actual order is not quite so clear-cut. It includes considerable wiggle room if the "buy American" provision turns out to be impractical or runs afoul of international trade rules.

Some people welcome the president's push.

"I thought, it's about time," said Scott Paul, president of the Alliance for American Manufacturing, a partnership between the steelworkers union and domestic steel companies.

Thousands of steel jobs have been lost in recent years, partly as a result of cheap Chinese imports. Paul said those idle steelworkers would be happy to go back to work making pipes. But first, their employers will have to be convinced that Trump's mandate has staying power.

"It's kind of the chicken-and-egg thing," Paul said. "U.S. steelmakers are not going to open up lines to make massive amounts of pipes if they don't think pipes are going to be in demand. But once they know there is going to be a market, this is a product the steel industry will be eager to deliver."

Likewise, Trump has been pressing automakers to locate more assembly plants in the U.S. But that may overlook what's under the hood. Carmaking is a business that increasingly crosses national borders.

Many American automakers rely heavily on imported parts, while many foreign companies employ workers here in the U.S.

"The No. 1 American-made car was the Toyota Camry," said senior editor Kelsey Mays of the website Cars.com, which compiles an annual index of the most "American-made" models.

"That may surprise some people because Toyota obviously isn't based here in the United States. But the Camry has 75 percent domestic content. It's built in Georgetown, Ky., and Lafayette, Ind.," Mays says.

In fact, the five most American-made models on the Cars.com list last year all had Japanese nameplates.