Ties between the US and Ukraine have soured with Donald Trump calling Ukraine's Volodymyr Zelenskyy a 'dictator' in a public war of words. Meanwhile US and Russian diplomats met in Saudi Arabia to discuss Ukraine's future without representatives from Kyiv or Europe. Should the continent be preparing for a future without the US as an ally?

Bronwen Maddox is joined by historian and author Timothy Garton Ash, Georgina Wright, visiting fellow at the German Marshall Fund and Orysia Lutsevych, deputy director for Chatham House's Russia and Eurasia Programme.

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Presented by Bronwen Maddox. Produced by John Pollock with Indio Media.

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Should Europe start planning for the worst?

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