President Donald Trump reversed course on Tuesday (March 11) afternoon on a pledge to double tariffs on steel and aluminum from Canada to 50%, just hours after announcing the higher tariffs, in rapid-fire moves that scrambled financial markets. The switch came after a Canadian official also backed off his own plans for a 25% surcharge on electricity. Meanwhile, Trump reiterated his call for Canada to become 51st U.S. state in order to avoid tariffs.