Questions about the primacy of US dollar as world's reserve currency

In recent weeks, the "almighty dollar" has seen its value tumble compared to other major currencies like the euro. It's happening at a time of uncertainty about the impact of the Trump administration's tariffs, causing some to wonder about the future of the dollar as the world's go-to reserve currency. The World's Carolyn Beeler speaks to David Lubin, a senior research fellow at Chatham House, an international think tank based in London. He joined the show from Washington.