The world this week
Politics Britain’s ambassador to America, Sir Kim Darroch, resigned after President Donald Trump said he would “no longer deal with him”. The spat came after Sir Kim’s confidential cables to London were leaked to a newspaper. They described the White House as “dysfunctional”, “clumsy” and “inept”, and its occupant as “radiat[ing] insecurity”. The British government backed its man, but Boris Johnson, the probable next prime minister, conspicuously did not. Sir Kim took the hint. Mr Trump violated the American constitution by blocking those whose views he disliked from his Twitter account, a federal appeals court ruled. It said the First Amendment forbids a public official to operate in such a way on a platform used to conduct government business. The case was brought by the Knight First Amendment Institute at Columbia University…