The media world is in a fury: the Washington Post and Los Angeles Times recently announced that they would not endorse a presidential candidate. Editors and columnists at both papers have resigned in protest; readers have cancelled their subscriptions en masse. Why the outrage? Because everyone knew that those papers would have endorsed Kamala Harris. Why the certainty? Because the papers’ coverage of Donald Trump has been so unrelentingly negative. (The decision not to endorse was made by the papers’ owners: Jeff Bezos, in the case of the Post, and medical entrepreneur Patrick Soon-Shiong, in the case of the Times.)...