Behind the calls for "America First" after Russia-Ukraine

In the days leading up to the Russian invasion of Ukraine, a common counterargument to the voices warning of Vladimir Putin's possible next steps permeated America's political discourse from both the left and right. The isolationist impulse is nothing new, including “America First.”

Reality Check’s John Avlon speaks with former US Representative Jane Harman about the history of isolationism - from WWII to Donald Trump to rhetoric heard from Tucker Carlson, Glenn Greenwald and J.D. Vance.

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