D onald Trump should be made to sign a good behaviour contract before being allowed to rejoin Facebook, London Mayor Sadiq Khan has said. Mr Khan, who repeatedly clashed with the former president while he was in the White House, accused online firms of monetising hate by promoting harmful content. Mr Trump’s Facebook and Instragram accounts were suspended for two years in June 2021 for posts stoking the violence ahead of the Capitol riot in Washington DC. At a fringe meeting at the Labour conference in Liverpool, Mr Khan said: “If it is the case that Donald Trump is a...