FACT CHECK: Donald Trump Says London Mayor Sadiq Khan Is ‘Half’ the Size of New York’s Bill de Blasio

The truth is more complex, our analysis finds

Even before he boarded Air Force One to fly off to Britain, the former enemy empire vanquished by American rebel forces during the Revolutionary War, President Donald J. Trump was feuding with Sadiq Khan, the mayor of London who recently said it was "un-British" for his country to host Trump for a state visit.