Donald Trump floats Nigel Farage for ambassador post - but there's a catch

President-elect Donald Trump has suggested that Nigel Farage, the interim leader of the UK Independence Party, would make a "great" British ambassador to the US. 
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There's one little caveat, though. The position is not vacant, as pointed out by Downing Street. 
In a late-night tweet, Trump claimed "many people would like to see @Nigel_Farage represent Great Britain as their Ambassador to the United States."Many people wo