(LONDON) Popular London mayor Boris Johnson has renewed his US passport. It might seem fanciful but could he possibly become UK prime minister and then US president, asks Tom de Castella. Boris Johnson renewed his US passport in November 2012, the London Mayors aides have confirmed. The news came as a surprise to some. InaRead MoreThe post Who, What, Why: Could Boris Johnson be UK PM and then US president' appeared first on The Sun News. Click here to read full news..