Listen: For a special edition of the GZERO World Podcast, Ian Bremmer sits down with former Treasury Secretary Larry Summers to get his economic assessment of President Trump's unprecedented imposition of tariffs, which has sparked an escalating trade war.

"I don't see this as a rational way of either pursuing the objective of strengthening US manufacturing or the objective of reducing other countries' trade barriers," Summers tells Bremmer. "This is probably the worst, most consequential, self-inflicted wound in US economic policy since the Second World War."

Summers, who was also at one point the President of Harvard University, is especially astonished by the lack of backbone that certain institutions, from universities to law firms, have shown when it comes to standing up against the Trump administration. "History will record of the United States establishment at this moment, that it allowed itself to be especially cowed...If Harvard is not prepared to speak up... it's hard to imagine who will."

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