Donald Trump today claimed London wants to 'go to Sharia law' as he once again described Sir Sadiq Khan as a 'terrible mayor'. 'I look at London, where you have a terrible mayor, terrible, terrible mayor, and it's been changed, it's been so changed. The mayor of London Khan, mayor Khan has done a terrible job. Mayor of London Sir Sadiq Khan speaks with police officers in London's West End on July 30'And on immigration, he's a disaster. As Mr Trump was sworn into the White House for a second term, Sir Sadiq warned of a 'resurgent fascism'.