Obama: In April Johnson branded Obama a 'part-Kenyan' who harboured an 'ancestral dislike' of Britain for claiming the UK would be 'at the back of the queue' for a trade deal if Britons voted to leave the EU Trump: "The only reason I wouldn't go to some parts of New York is the real risk of meeting Donald Trump." Clinton: In 2007 he described Hillary Clinton as having 'a steely blue stare, like a sadistic nurse in a mental hospital' The Japanese schoolboy he tackled during a game of street rugby on a visit to Tokyo Putin: "Despite looking a bit like Dobby the House Elf, he is a ruthless and manipulative tyrant," Johnson wrote in his Telegraph column Africa: In 2006 he suggested Tony Blair would be greeted "with crowds of flag-waving piccaninnies" — an offensive term for a black child