The U.S. Military Wants A.I. Dominance. Feuds and China May Thwart It.

The administration is veering wildly in its response to the national security implications of A.I. as China, America’s main technological and military rival, charges ahead.

Why the Movements of a U.S. Oil Company in Greenland Have Attracted Attention

Here's what to know about the company behind the controversial oil project and why the Greenland government issued a stern warning.

U.S., Canada race for deal to avert Trump's threat of 50 percent tariffs

The tariffs are the latest exchange in a dispute that has disrupted the once harmonious — and nearly tariff-free — relationship over the past year.

Canadian Petition to Expel U.S. Ambassador Pete Hoekstra Takes Off

Mr. Hoekstra has been President Trump’s faithful messenger in Canada amid a historic low in relations. More than 170,000 Canadians want him gone.