The United States was set to impose 50% tariffs on $20 billion worth of Canadian products early Saturday after last-ditch negotiations failed to resolve the latest strain in already tense relations between the historic allies. Mark Carney accuses Washington of ‘unfair’ last-minute changes to deal, as US and Canada fail to reach agreement after three-day extension of talksCanadian prime minister Mark Carney has promised to match US tariffs “dollar for dollar”, after the two sides failed to agree a trade deal by the midnight deadline.“Last-minute changes in the US proposed terms were unfair, uneconomic, and called into question the reliability of any deal,” Carney said in a statement. Key points and original sources are listed below.

• The United States was set to impose 50% tariffs on $20 billion worth of Canadian products early Saturday after last-ditch negotiations failed to resolve the latest strain in already tense relations between the historic allies. “Tonight, Canada declined to fina...S1

• Mark Carney accuses Washington of ‘unfair’ last-minute changes to deal, as US and Canada fail to reach agreement after three-day extension of talksCanadian prime minister Mark Carney has promised to match US tariffs “dollar for dollar”, after the two sides fai...S2

• The tariffs were originally set to kick in Wednesday, but Trump announced a three-day pause to allow the trade talks.S3

• Mark Carney suspended talks and will take out retaliatory tariffs against the United States after days of negotiations to stave off new levies by the Trump administration ended in an impasse.S4