A chief whip's role and the pressures of modern politics

Colonel Mark Cancian on why the US has moved a carrier strike group into the Caribbean. Then: Justin Quirk and Zoë Grünewald discuss the ‘Donroe Doctrine’ and whether ‘2001: A Space Odyssey’ could become reality. Plus: Simon Hart on his book, ‘Ungovernable: The Political Diaries of a Chief Whip’.

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