They are some of the biggest names in the Republican national security firmament, veterans of past GOP administrations who say, if called upon by President-elect Donald Trump, they stand ready to serve their country again. But their phones aren’t ringing. Their entreaties to Trump Tower in New York have mostly gone unanswered. In Trump world, these establishment all-stars say they are “PNG” — personae non gratae. Their transgression was signing one or both of two public “Never Trump” letters during the campaign, declaring they would not vote for Trump and calling his candidacy a danger to the nation. ... During...