The US Supreme Court has struck down the Trump administration’s use of the International Emergency Economic Powers Act (IEEPA) to impose sweeping “Liberation Day” tariffs. This is a big deal!

In this episode, Darren argues that the decision is not primarily a story about tariffs — important as they are — but about power. The Court has drawn a clear line around the President’s ability to declare an “emergency” and unilaterally impose across-the-board tariffs. While other tariff authorities remain in place, the removal of IEEPA as a rapid escalation tool represents a concrete institutional constraint on executive authority.

What does that mean for Trump’s negotiating leverage? How does it change the international landscape — particularly ahead of a planned visit to Beijing? Why does this matter for Australia’s vision of regional order?

Darren cannot avoid the bad news: heightened uncertainty, likely litigation, and the longer-term drift toward protectionism that this ruling will not reverse. But ultimately, this episode asks a bigger question: what actually constrains presidential power in the United States? And does this moment represent a small but meaningful crack in the aura of inevitability surrounding the current administration?

Australia in the World is written, hosted, and produced by Darren Lim, with research and editing this episode by Hannah Nelson and theme music composed by Rory Stenning.