Under the Trump administration, U.S. support for Ukraine is no longer guaranteed. President Trump's pause on aid and intelligence to Ukraine in March may have been brief, but it sent a clear message to Europe and Ukraine that the U.S. may no longer be a reliable partner for Ukraine. A reduction or end to U.S. support for Ukraine could have a significant impact on the conflict dynamics in Ukraine and present a challenge for European allies as to whether they can step up and fill the gap.  

Celeste Wallander joins the podcast to provide a firsthand account of the evolution of U.S. assistance to Ukraine and to discuss how a united Europe can help Kyiv keep up the fight. 

Celeste Wallander was the assistant secretary of defense for International Security Affairs and is a adjunct senior fellow at CNAS.