The U.S. president says he will impose tariffs on Canada and Mexico starting tomorrow. Canada is trying to prepare. Ottawa says there are countermeasures ready and waiting, depending on what Donald Trump actually does. That uncertainty is causing stress for businesses waiting to see what happens. We have a story from Windsor, Ontario – home to major auto assembly plants. Full tariffs could mean mass layoffs by the end of the week. Workers there say they are anxious about what comes next.

And: Picking up the pieces of the Trump-Zelenskyy relationship. Ukraine’s president Volodymyr Zelenskyy is leaning on Europe, which is trying to form “a coalition of the willing” to protect his country.

Also: Who owns Antarctica? The short answer: no one. But the long-term answer could get more complicated, as countries eye fishing and mineral access to the continent. Does it need more protection?

Plus: Ontario changes screen protocol for cervical cancer, Trudeau meets King Charles and more.

"A once in a generation moment" for Europe's security. That is how Britain's Prime Minister Kier Starmer is framing Sunday's summit, aimed at achieving peace in Ukraine. In attendance was Justin Trudeau along with the leaders of more than a dozen European countries. The summit was planned some time ago, but it's taking on added significance after Friday's tense meeting between Donald Trump and Volodymyr Zelenskyy.

Also: The White House is again sending mixed signals about its threatened tariffs. The U-S seems poised to impose the sweeping measure this Tuesday. But it's still unclear, if those tariffs will be as steep as originally planned.

And: Around this time next Sunday, the Liberal Party will elect its new leader. Voting is already underway, but a voting app that was supposed to make the process simpler and more secure is now causing issues.

Ukrainian president Volodymyr Zelenskyy is searching for calmer waters across the pond - one day after a heated confrontation with U.S. President Donald Trump and Vice President JD Vance in the Oval Office. By contrast, a meeting with Britain's Prime Minister Saturday was cordial and supportive. And comes just ahead of a European summit looking at Ukraine's future after three brutal years of war.

Also: A Canadian Navy vessel has reached Antarctica. Now, the team of scientists on board is getting down to work to better understand how climate change has altered the Southern Ocean. You'll hear from CBC's International Climate Correspondent, who's onboard the ship.

And: The Latvian animated movie 'Flow' could soon take home Oscar gold. Its the first movie from the Baltic country to ever be up for an Academy Award. We'll take you to Riga...where Latvians are celebrating the film as a source of national pride.

With Ukraine's Volodomyr Zelenskyy seated next to them, U.S. president Donald Trump and Vice-president J.D. Vance berate, scold and mock him and his country, even suggesting he provoked Russia into invading. Ukraine's President didn't take it quietly. And the battle of words has thrown any deal making – whether for peace or for minerals… into serious question.

The confrontation has prompted reaction around the world, with European leaders coming out quickly to say they stand with Ukraine. Russian media has been gleeful – saying Zelenskyy got slapped.

And: As Ukraine awaits the fallout from Volodymyr Zelenskyy's disastrous encounter with Donald Trump, Canada is waiting to see what happens Tuesday when the U.S. is set to begin imposing tariffs on Canadian exports.

Also: Aid workers in Bangladesh say they're running out of options after the Trump administration abruptly paused foreign aid for 90 days. More than one million Rohingya refugees depend on that funding for essential services.

Plus: Historic majority for Ontario’s premier, bird flu and the price of eggs, and more.

U.S. President Donald Trump says Canada should expect tariffs on March 4th. He claims drugs are “pouring” over the border at unacceptable levels. Prime Minister Justin Trudeau says Canada will have an immediate and extremely strong response.

And: UK Prime Minister Keir Starmer is in Washington. Like the president of France earlier this week, Starmer is trying to get Trump onside with Europe on how to deal with the war in Ukraine. European leaders are worried about Trump’s willingness to work with Russian President Vladimir Putin without including Ukraine’s President Volodymyr Zelenskyy.

Also: The families of two murder victims say it’s an emotional day, after the discovery of possible human remains at a landfill north of Winnipeg. Morgan Harris and Marcedes Myran were murdered by a serial killer in 2022. Their families and communities have been fighting to have the landfill searched for their bodies. The identification process might take weeks.

Plus: Antarctic climate research, provinces try to improve primary care, Gene Hackman remembered while investigation continues, and more.

A coalition of leftist parties is projected to win the most seats in France's snap election - a surprise turnaround from the predicted surge of the far-right National Rally party. Also: The calls are slowly growing louder - for Joe Biden to drop out of the U.S. presidential race. And so -- some Democrats are talking about the possibility of passing the torch. Plus: A Spanish Galleon ship that sank in Labrador in the 16th century is being recreated - with plans to set sail once again.

They’re on, they’re off, they’re now, they’re not. Canadians are trying to figure out what’s happening with tariffs threatened by U.S. President Donald Trump. There is more confusion today, as he claims they are full steam ahead, but his commerce secretary says there is still a chance to avoid them.

Trump says Ukrainian President Volodymyr Zelenskyy will be in Washington on Friday to sign an agreement on rare earth minerals. Trump says the deal is payback for the aid the U.S. has provided during the war. But what is it Trump is so keen to get from Ukraine? The CBC’s Chris Brown visits mines there to find out.

Mortgage defaults are up across Canada, with BC feeling the worst of it. Mortgage holders who are falling behind in their payments are also carrying substantially higher balances, likely because of pre-pandemic interest rates.

Plus: Ontario election tomorrow, Carney accused of lying, and more.