Steel and aluminum are ubiquitous in Americans’ lives. A stainless steel refrigerator holds aluminum soda cans. A stainless steel drum tumbles inside an aluminum washing machine. They’re the metals used in cars and airplanes, phones and frying pans, skyscrapers and zippers.

U.S. President Donald Trump's trade adviser Peter Navarro said on Tuesday that an increased tariff of 50% on Canadian steel and aluminum will not take effect on Wednesday. Earlier in the day, Trump had ordered that an across-the-board tariff of 25% on all steel and aluminum imports that is slated to take effect on Wednesday be doubled on Canada after Ontario Premier Doug Ford said he would impose a surcharge on electricity exports to the United States.