The Boston Globe has urged newspapers across the country to publish editorials today promoting the value of a free press, and to defend it against criticisms by President Donald Trump. It’s reasonable to ask why. It’s not news that a president of the United States doesn’t like the news media. Most presidents don’t. Thomas Jefferson, who was routinely attacked by the press of his day, once said the only truths in a newspaper were in the advertisements. What’s disturbing today is the bitter vitriol and open contempt directed toward the news media.