In today’s newsletter: With elbows up on both sides, two very different political operators – Mark Carney and the Conservative party leader Pierre Poilievre – attempt to fend off threats from the south

Good morning. When Justin Trudeau announced he would be resigning as Canada’s prime minister in January, he did so amid surging support for the Conservative opposition and a sense that its Trump-adjacent leader, Pierre Poilievre, might be the right candidate for a new political era. The Liberals’ near-decade in power appeared to be close to an end.

Now, Trudeau’s successor, the former Bank of England governor Mark Carney, has called a snap general election against a dramatically different political backdrop. With Donald Trump’s tariff war and musings about Canada’s future as a 51st state the inescapable mood music, many voters who had given up on the Liberals appear ready to give them another hearing – and Poilievre is trying to distance himself from the president whose methods he was once so happy to adopt.

Trump administration | A catastrophic security leak triggered outrage in US politics after senior Trump administration officials accidentally broadcast highly sensitive military plans through a Signal group chat with a journalist reading along. The stunning breach implicates key figures in the Trump administration including the vice-president, JD Vance.

Domestic violence | Domestic abusers are driving their victims to suicide, police have warned, as they admitted to past mistakes and pledged to investigate more “hidden” cases of violence against women. The concession came as deaths by suicide among victims of domestic abuse surpassed the number of people killed by an intimate partner for a second year in a row.

UK economy | Rachel Reeves will put £2bn into affordable housing in a bid to “sweeten the pill” of the spending cuts being announced at this week’s spring statement. The chancellor will set out one of the tightest budget buffers on record, with the Office for Budget Responsibility expected to put the government about £5bn in the red.

Turkey | Turkish authorities have arrested more than 1,100 people including journalists, while bombarding the social media platform X with requests to block hundreds of accounts after tens of thousands took to the streets in the largest anti-government demonstrations in years.

Archaeology | One of the biggest and most important iron age hoards ever found in the UK has been revealed, potentially altering our understanding of life in Britain 2,000 years ago. More than 800 objects were unearthed in a field near the village of Melsonby, North Yorkshire dating back to the first century.

Prime minister launches contest expected to focus on US relations, as Liberals enjoy lead over Conservatives

Canada’s prime minister, Mark Carney, has called a snap election on 28 April, firing the starting gun on a contest that is widely expected to focus on the strained relationship with the US amid threats to Canada’s economic and political future.

“We are facing the most significant crisis of our lifetime because of President [Donald] Trump’s unjustified trade actions and his threats to our sovereignty,” he said. “He wants to break us, so America can own us. We will not let this happen. We’re over the shock the shock of the betrayal, but we can never forget the lessons. We have to look out for ourselves. We have to look out for each other.”