Any political leader must envy Theresa May, Britain’s prime minister, who has already virtually won the UK’s general election, even though it doesn’t take place for another month, without promising anything more than “strong and stable government.” She has avoided being questioned by the media and by critical voters, and has not explained how she is going to deliver stability as Britain approaches its Brexit destiny – apart from showing that she will be as tit-for-tat tough and horrible as she deems necessary with European Union negotiators. The Conservative Party manifesto, due out in a day or two, will provide some clues on policies, but victory has been virtually assured by big victories that the party won in regional and local elections last week.