Annually and increasingly, tens of thousands of people are leaving blue states because of politics. If you’re old enough, you’ll recall the 1961 Berlin crisis. I recall it subsequently, when schools taught real history. That crisis happened during the Cold War’s peak years. In brief, Soviet leader Nikita Krushchev wanted the U.S. out of West Berlin. There were multiple reasons, but, chiefly, access to West Berlin allowed East Germans to escape communist rule. According to the National Archives, by 1961, as many as four million Germans had escaped East Germany using West Berlin. With tensions rising, and the hemorrhaging increasing,...