The United States buys more steel from Canada than from any other country, and those imports will become much more expensive under tariffs President Trump intends to impose this week.

That’s good news to Stephen Capone, president of Capone Iron Corporation of Rowley, Mass., which makes steel stairs, handrails, gratings and other products and has around 100 employees. For too long, he said, Canadian competitors have been flooding the New England market with cheap steel products, preventing his and other local companies from winning business.

Robinson’s history of comments that have been widely criticized as antisemitic and anti-gay made him a deeply polarizing figure in North Carolina long before his bid for governor was upended last week by a CNN report that he had called himself a “Black NAZI” and praised slavery while posting on a pornographic website between 2008 and 2012. Now, some of his allies are abandoning him. Most of his senior campaign staff members have resigned. The Republican Governors Association said that its pro-Robinson ads would expire tomorrow and that no new ones had been placed. And former President Donald Trump, who endorsed Robinson in the spring, calling him “Martin Luther King on steroids,9x999 slots” did not mention him once during his rally in the state over the weekend.

“No matter how low we bid, they can underbid us on any job,” Mr. Capone said. “They’re decimating our market.”

Many companies oppose Mr. Trump’s tariffs, fearing that they will push up costs and provoke retaliation against their products by other countries. Ford Motor’s chief executive, Jim Farley, said last month that tariffs could “blow a hole” in the U.S. auto industry, and retailers have warned that they will lead to higher prices for consumers.

But there are deep pockets of support for his trade policies in the business world, particularly among executives who say their industries have been harmed by unfair trade.

In particular, the leaders of American steel and aluminum companies have long contended that foreign rivals undercut them because those rivals benefit from subsidies and other government support. And they say that tariffs, when imposed without loopholes, have been effective at spurring more investment in the United States.

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