To try to be a meaningful bridge from Europe to America, that’s a daunting project for even the most agile of European leaders. Understandably, most do not even try. The United States, after all, was born in revolt from Europe—from the “Old World.” The great exception proves the rule. Winston Churchill was a fellow member of the Anglosphere who came to power at a time of crisis, the Second World War, that begged for close cooperation between Europe and America. As for Thatcher, she wa...