JD Vance has decided overnight to join his wife Usha on her trip to Greenland. No one knows who invited him. Or whether he was invited. Or if its a formal state visit. Or just a trip to the US airbase. But the Danish Prime minister has called the trip an unacceptable pressure. Vance insists it's about protecting Greenland's security. But it feels kinda threatening. We speak to an old friend of JD Vance, Sofia Nelson, who knew him well at Yale Law School - and even went to his wedding - about the man he was and the politician he's now become.

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