President Donald Trump’s move to impose tariffs on Canada, Mexico and China is the most extensive act of protectionism taken by a US president in almost a century. What does that mean for the rest of the world? Bloomberg’s Stephanie Flanders joins reporters Brian Platt in Canada and Brendan Murray in the UK. What questions do you have? Join our Live Q&A on Feb. 4 at 10 a.m. EST — it’s free and available for everyone to listen to. Bloomberg digital subscribers and Terminal clients are invited to sign in and ask questions.