New Canadian Prime Minister Mark Carney arrived in Paris to meet with French President Emmanuel Macron, seeking support from one of Canada’s oldest allies as tensions with the Trump administration spike.

OTTAWA—Mark Carney took over Friday as Canada’s prime minister, planting a former central banker known for navigating crises in the middle of a trade war with President Trump and likely kicking off a national election.

Canada and Australia are planning to jointly develop a new military radar system in the Arctic amid a global surge of interest in the region, according to Canadian Prime Minister Mark Carney, who warned that Canada’s “adversaries are increasingly emboldened.

Canada's new leader has announced a radar purchase from Australia and an expansion of military operations in the Arctic while visiting Canada’s far north in an effort to assert sovereignty over the in