'After Ulysses S. Grant, the 18th president of the United States, died 130 years ago today, a million and a half Americans watched his funeral procession. His mausoleum was a popular tourist attraction in New York City for decades. But for most of the 20th Century, historians and non-historians alike believed Grant was corrupt, drunken and incompetent, that he was one of the country's worst presidents, and that as a general, he was more lucky than good. A generation of historians, led by Columbia's William A. Dunning, criticized Grant for backing Reconstruction, the federal government's attempt to protect the rights...