Last week, President Trump announced sweeping tariffs on nearly all countries, including ones that don't have any human inhabitants. In the process, Trump remade the global economy in a single press conference. But the economic theory that Trump is basing this new world order on might be entirely false.

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Guest: Mehreen Khan, Economics Editor, The Times.

Host: Manveen Rana.

Producer: Taryn Siegel.

Clips: WSJ News.

Photo: Getty Images.

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