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Over the weekend, London Mayor Boris Johnson announced that he would break from U.K. Prime Minister David Cameron and support the growing campaign to take Britain out of the European Union in order to restore UK sovereignty.
As one of Britain’s most charismatic politicians, the mayor’s decision will have tremendous influence over how the public votes in the referendum in June.
Here to explain is Jon Sopel, the BBC’s North America Editor.
What you’ll learn from this segment: