Keir Starmer's pledges on defence spending may not be enough for president-elect Donald Trump, who says NATO members need to put far more into their own military budgets. With the Prime Minister joining EU leaders for a summit in Hungary, we asked the Royal United Services Institute's Military Sciences Director, Matthew Saville why Europe's leaders are so anxious about a Trump second term. Hosted by Caroline Hepker and Yuan Potts. 

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