The U.S. Supreme Court ruled on Friday that the broad tariffs President Donald Trump justified with national emergency powers — including the 35 per cent imposed on non-CUSMA-compliant Canadian goods — are illegal, leading Trump to immediately announce a global 10 per cent tariff through a different legal avenue. Canada-U.S. Trade Minister Dominic LeBlanc responds to questions about whether Canada will still enjoy a CUSMA exemption by saying the U.S. never granted it 'because they want to be nice to us,' but because it's in the 'American economic interest.' Then, Alberta Premier Danielle Smith defends her plan for an October referendum that would ask about imposing fees and limitations on services for immigrants without certain statuses, as well as constitutional changes like abolishing the federal Senate.

Conservative public safety critic Frank Caputo tells Power & Politics that the Conservative caucus is still behind leader Pierre Poilievre after a third floor-crossing to the Liberals, saying 'the mood for me is one of business as usual.' The Power Panel reacts. Then, asked what U.S. data showing its global trade deficit hitting a record high says about the effectiveness of U.S. President Donald Trump's tariffs, economist Justin Wolfers responds with a laugh.

CBC's Rosemary Barton explains everything we know about Alberta Conservative MP Matt Jeneroux's decision to cross the floor to the Liberals, and rumours that more Conservatives could still follow. Then, former Conservative campaign manager Fred DeLorey and former Liberal campaign co-chair David Herle discuss the potential of a Liberal majority, which could now be completed with a win in a Quebec vote that DeLorey calls 'the most consequential byelection in Canadian history.'