Trump Fights With br London Mayor Ahead of Visit to UK London Mayor Sadiq Khan, an outspoken critic ofbr Trump, recently penned a column likening hisbr controversial policies to past European dictators. The column titled 'It’s un-British to roll outbr the red carpet for Donald Trump,' referredbr to the U.S. president as a “global threat.” Trump responded to thebr column on Twitter soon after,br insulting Khan and his height. Donald Trump,br via Twitter Trump also referred to Khan as abr “stone cold loser,” and warned himbr against being “nasty” to an ally of the U.K. Donald Trump,br via Twitter Khan’s office responded to Trump, calling hisbr tweets “much more serious than childish insults.