The boom in the defense sector reflects Canadian Prime Minister Mark Carney’s vow to strengthen the country’s economic self-sufficiency amid fraying relations with Washington, including a fresh escalation this week with new rounds of tariffs.

Donald Trump reiterated his push to rename one of the Great Lakes in an interview on Wednesday, and later shared a video on social media of him using a black marker to rename the lake on a map.

TORONTO (AP) — U.S. President Donald Trump says his country does not need Canada. But every day, roughly 4 million barrels of Canadian crude oil flow south, helping fuel American cars, trucks and airplanes and supply U.S. industry. And oil is only the beginning.

Canadian leaders are looking for leverage over the US, from F-35 purchases and coal shipments to cutting off electricity exports.

Our Canada bureau chief tells us how the countries got into a trade war and how people north of the border are experiencing the rift.

Canadian officials said the tariffs set to be imposed on more than 800 U.S. imports are "strategic" and designed to target some states.

Canada is the first U.S. ally to absorb tariff pain rather than settle. CFR’s Brad W. Setser explains what the breakdown costs both economies—and why other countries are likely watching the fallout closely.