A.M. Edition for Mar. 12. Oil prices briefly topped $100 a barrel following a wave of new Iranian attacks on vessels in the Persian Gulf. WSJ reporter Chelsey Dulaney helps break down the economic winners and losers of what the International Energy Agency now says is the biggest oil supply disruption ever. Plus, President Trump returns to the tariff drawing board. And a new study finds AI isn't lightening workloads. Luke Vargas hosts.

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