Ontario implemented a 25 percent tariff on all electricity exports to the U.S. on Monday, impacting three states.

Canadians and Republicans alike are confounded as President Donald Trump increasingly links a trade war to his push to annex America's northern neighbor.

Canadian leaders have pledged retaliatory efforts against tariffs imposed by President Trump, such as blocking electricity ...

The country's leadership, meanwhile, reportedly believes that its mineral wealth may be behind the president's apparent interest in integrating Canada into the U.S. As shown on the map below ...