The president first announced the doubling of tariffs on aluminum and steel at a rally in Pennsylvania last week.

Canada called the tariffs "unlawful," Mexico said they're "not fair" and the EU warned they'll hurt all consumers.

One of America's most storied industries is getting a massive boost from President Donald Trump's latest tariffs push — at the potential cost of a broader slowdown elsewhere in the U.S. economy. Trump signed an executive order increasing the already substantial 25% duties on steel imports he first set in March to 50%.