The move could escalate a trade war between the world's two biggest economies and potentially raise prices on goods ranging from handbags to bicycle tires.
The president denounces the use of his off-the-record remarks but says that "[a]t least Canada knows where I stand!"
Acknowledging trade is complex on a number of fronts, the "Last Week Tonight" host details the numerous ways the U.S. president's approach to the issue is founded in misconceptions and ignorance.
Tariffs aren't just alienating our allies; they are actively harming American workers.
The tariffs on cars, alcohol and coal are unlikely to have much economic impact, but they highlight deteriorating relations with the U.S. and a feud that has helped trigger a currency crisis.
The Trump administration's tariffs are raising the cost of imported construction materials, squeezing homeowners seeking to rebuild after losing their homes to natural disasters, including the wildfires scorching parts of California.
The plan for $12 billion in emergency relief is quickly dismissed by some farm-state Republicans, who say farmers want markets for their crops, not government payoffs.
U.S. markets slide as the president says he's willing to hit every product imported from China with tariffs and again criticizes the Federal Reserve, as well as some of the nation's biggest trading partners.
The proposal aims to keep the United Kingdom and the European Union in a free-trade zone for goods, but not for services, which make up the bulk of the British economy.