SETH BARRETT TILLMAN: Trump, the UK, and Ambassador Kim Darroch. “Martin Kettle quotes British diplomatic officials as stating that there is no precedent for what Trump has done—in seeking to have Kim Darroch removed from his post as the UK’s ambassador to the United States. Kettle and the diplomatic officials he quotes are simply mistaken. It is common practice for countries to deny granting consent and also to withdraw consent once granted in regard to the presence of foreign diplomatic officials who are not—or who are no longer—wanted. It is so common that it has been codified as established practice by the Vienna Convention on Diplomatic Relations (1961).”