WASHINGTON — President Donald Trump on Monday removed the exceptions and exemptions from his 2018 tariffs on steel, meaning that all steel imports will be taxed at a minimum of 25%. Trump also hiked his 2018 aluminum tariffs to 25% from 10%.

“We were being pummeled by both friend and foe alike,” Trump said as he signed two proclamations changing his orders during his first term that go into effect on March 4. “It’s time for our great industries to come back to America.”

The moves are part of an aggressive push by the president to reset global trade, with Trump saying that tax hikes on the people and companies buying foreign-made products will ultimately strengthen domestic manufacturing. But the tariffs would hit allies as the four biggest sources of steel imports are Canada, Brazil, Mexico and South Korea, according to the American Iron and Steel Institute.

Trump also intends this week to reset U.S. taxes on all imports to match the same levels charged by other countries. All of that comes on top of the 10% tariffs he already put on China, China’s retaliatory tariffs that started Monday and the U.S. tariffs planned for Canada and Mexico that have been suspended until March 1.

Monday’s tariffs almost immediately drew criticism from Canada, the largest source of steel imports. Candace Laing, president and CEO of the Canadian Chamber of Commerce, said that Trump was a destabilizing force in the global economy.

“Today’s news makes it clear that perpetual uncertainty is here to stay,” said Laing.

The tariffs carry inflation risks at a moment when voters are already weary of high prices and fearful that price increases will eclipse any income gains. Trump maintains that the tariffs will level the playing field in international trade and make U.S. factories more competitive, such that any pain felt by consumers and businesses would eventually be worthwhile.