Tensions between celebrity and diplomacy

The King prepares for a high-stakes visit to Washington, and Donald Trump says it will be "terrific".

But behind the scenes, the special relationship is looking anything but, after another social media insult from the president, warning the UK to "go get your own oil" from Iran.

When the King arrives, can he help calm things down? Martha and David discuss.

Plus, Trump is putting his name on everything from airports to a towering presidential library complete with a gold statue. At what point does branding become something else entirely?

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