Boris Johnson’s resignation can’t disguise the harsh reality of Brexit
John Cassidy writes: In the two years since a narrow majority of Britons voted to leave the European Union, the planning of the country’s actual departure has often looked like a disaster unfolding in slow motion. In the past few days, as an anonymous public servant, displaying the sangfroid for which British mandarins used to be famous, put it, “we have at least now reached the kinetic phase of the car crash.” Prime Minister Theresa May—facing the thankless, and maybe…