During the presidential election campaign of 1864, Henry J. Raymond wore two hats: He was chairman of the Republican National Committee and he was editor of the New York Times. Early American newspaper publishers scoffed at the idea that they should hide their political prejudices under a cloak of objectivity. "To profess impartiality here," wrote William Cobbett in his Federalist newspaper, Porcupine's Gazette, "would be as absurd as to profess it in a war between virtue and vice, good and evil, happiness and misery." The motto of the Gazette of the United States, which began publication in 1789, was "He...