Tariffs of 50% on Canadian goods came into effect after trade talks collapsed. US President Trump has warned Ottawa to "fall in line," but Canadian Prime Minister Mark Carney has refused to accept a "bad deal."

The United States imposed 50% tariffs on about $20 billion worth of Canadian goods Saturday after days of negotiations between the two longtime allies...

The fallout marks the latest development in the tenuous relationship between Trump and Carney that has centered on the push-and-pull of tariff talks.

Canadian Prime Minister Mark Carney vowed to retaliate \

United States President Donald Trump imposed fifty percent tariffs on Canadian imports. Canada's Prime Minister Mark Carney promised matching retaliatory measures starting…