The United States-Ukraine plan for a temporary ceasefire has turned up the heat on Russian President Vladimir Putin. What are Donald Trump's next moves if Putin either refuses to accept the deal or places unacceptable demands on Ukraine and its allies?

Host Anne McElvoy talks to Kurt Volker, who has a particular insight into Trump’s thinking on Ukraine. Volker was the U.S. special representative during his first administration and America’s ambassador to NATO under President George W. Bush. They discuss how any ensuing negotiations might play out and whether a meaningful peace deal can be achieved.

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