Canadian Prime Minister Justin Trudeau says he he expects Canada and the U.S. to be in a trade war for the foreseeable future after having what he called a colorful but constructive call with U.S. President Donald Trump this week

Ontario Premier Doug Ford said in an interview with ABC News Live that President Trump's tariffs against Canada are the "craziest idea someone could ever come up with."

President Donald Trump's broad tariffs on imported goods from Mexico and Canada took effect on Tuesday.

The stock market tumbled Monday after President Donald Trump said tariffs would go into effect for Mexico, Canada and China as planned on Tuesday.

President Donald Trump is moving ahead with 25% tariffs for Canada and Mexico, plus a newly increased 20% tariff on China. Economists say they will mean higher prices for consumers.

Britain’s King Charles III has given a warm welcome to Canadian Prime Minister Justin Trudeau as the two met for a private audience at the monarch’s royal residence Sandringham

The 25% tariff on most imported Canadian goods that President Donald Trump’s plans to impose Tuesday has touched off a range of emotions along the world’s longest international border

President Donald Trump's assertion that Canada should become the 51st state would likely lead to major Democratic electoral gains.

Canadian Prime Minister Justin Trudeau took a jab at President Trump after Canada's victory over the United States in an international hockey tournament.

Connor McDavid scored an overtime winner to lift Team Canada over Team USA in the inaugural 4 Nations Face Off final, 3-2.

Canada is listing seven Latin American criminal organizations as terrorist entities under the criminal code, giving Canadian law enforcement another tool in the fight against fentanyl trafficking, authorities say

Trump told reporters on Sunday he planned to speak with Canadian Prime Minister Justin Trudeau and Mexican President Claudia Sheinbaum on Monday.

The U.S. has paused for one month the implementation of tariffs on Canada and Mexico following President Donald Trump's conversations with each nation's leaders on Monday.

The U.S. has paused the implementation of tariffs for a month in both Canada and Mexico following conversations on Monday with President Donald Trump, according to each country's leader.

President Trump ordered tariffs on imports from America's biggest trading partners, claiming he's doing it to stop the flow of drugs and undocumented immigrants into the U.S.

The policy risks raising prices for essential products like gas and groceries.

In an interview on ABC News' "This Week," Canadian Ambassador to the U.S. Kirsten Hillman said Canadians are "perplexed" and "disappointed" by President Trump's tariffs.

On “This Week,” ABC News senior White House correspondent Selina Wang reports on the new tariffs announced by President Donald Trump Saturday. 

ABC News Correspondents Selina Wang and Alexis Christoforous provide the latest updates regarding President Donald Trump's increased tax of goods imported from Mexico, Canada and China.

Canadian Prime Minister Justin Trudeau responded to President Donald Trump’s tariffs Saturday evening by announcing the country will implement 25% tariffs on $155 billion of U.S. goods.

Consumers brace for rising prices as President Donald Trump imposes tariffs on Canada, Mexico and China. 

Economist Kimberly Clausing joined ABC News Live to talk about the possible effects for Americans of Trump’s newly imposed tariffs.

The development comes a month after Canada's deputy prime minister, Chrystia Freeland, resigned suddenly from Trudeau's cabinet.

Trudeau announced he intends to resign as Liberal Party leader and prime minister once a new party leader is determined.

The development comes a month after Canada's deputy prime minister, Chrystia Freeland, resigned suddenly from Trudeau's cabinet.

Cameron Dylan McDougall, 28, from Toronto, Canada, faces three counts of battery charges.

An Air Canada Express flight with 73 passengers aboard caught fire and had to be evacuated on a runway after landing in Halifax.

Authorities assigned to a region near the Canadian border in Washington found two backpacks left out in the woods containing an estimated $1.1 million of cocaine.

The meeting comes after Trump threatened sweeping 25% tariffs on goods from Mexico and Canada.

The surprise meeting took place amid reports that Canada may be considering retaliatory tariffs against the United States.

The school has become a central part of the lives of some who fled the war, even if they didn't initially intend it to become so.

Olivier Rioux holds the Guinness World Record for world's tallest male teenager.

Police in Canada took down an organized crime group believed to have produced tens of thousands of counterfeit cannabis-laced candy bars resembling named brand candy.

ABC News’ Mireya Villarreal met with the Department of Homeland Security to learn about the unique challenges teams face at the U.S. northern border.

One of the unions issued a strike notice just hours after the freight trains resumed operations following a brief lockout. A work stoppage could disrupt supply chains.

Two major Canadian freight rail companies locked out thousands of workers on Thursday, shutting down cross-border shipping routes.

About 25,000 people were ordered to evacuate Jasper and Jasper National Park, leading to crowded highways as they tried to escape fires that have scorched more than 17,000 acres.

Nicco's mom Terri Lawson said her son "takes his routes seriously."

With wildfires burning across Canada, meteorologists said conditions are stacking up for a replay of last year's fire season when skies over New York City turned orange.

As the threat of an active wildfire season looms, there are steps individuals can take to mitigate the effects of wildfire smoke in their homes.

Dozens of wildfires burning in Alberta and British Columbia are impacting air quality in North Dakota, Minnesota and other U.S. states.

A motive is unknown at this time, police said.

ABC News' Phil Lipof speaks with Sandy LeClerc, the partner of World Central Kitchen aid worker Jacob Flickinger, who was killed in an Israeli airstrike, about the impact on her family.

Former Canadian Prime Minister Brian Mulroney dies at 84, his daughter announced.

Delta flight 135 from Amsterdam to Detroit diverted to Goose Bay Airport in the Canadian province of Newfoundland and Labrador around 3:15 p.m. on Sunday, Dec. 10.

The car crashed and exploded on Rainbow Bridge near Niagara Falls.

It not immediately clear what caused the vehicle explosion.

All four Canada-U.S. bridges over the Niagara River have been closed out of an abundance of caution while the investigation continues.

Videos of the aftermath appear to show a plume of smoke at the checkpoint.

A Jewish school in Montreal was shot at early Sunday, the second time in under a week the school has been targeted with gunfire, officials said.