On May 8, 1872, as covered by the "Washington Star", Mosby personally thanked then-U.S. President Ulysses S. Grant for that document. Mosby also told Grant he believed vehemently that election of Horace Greeley (a long-time editor of the "New York Tribune" detested in the South) would be worse for the South because the men surrounding him were worse than those surrounding his old benefactor Grant. A few days later, Massachusetts Congressman Benjamin Butler presented an amnesty bill for former Confederates, as Mosby had suggested in that meeting, and soon President Grant signed it into law. After Greeley became the Democratic party's nominee in July, Mosby became Grant's campaign manager in Virginia, and an active Republican, although he also made sure the Republicans would not run a candidate against his friend and fellow Warrenton attorney Eppa Hunton, who campaigned and won as a Democrat. In his autobiography Grant stated, "Since the close of the war, I have come to know Colonel Mosby personally and somewhat intimately. He is a different man entirely from what I supposed. ... He is able and thoroughly honest and truthful."