The following is a guest blog post by William A. Blair, author of The Record of Murders and Outrages: Racial Violence and the Fight over Truth at the Dawn of Reconstruction. Blair uses the accounts of far-flung Freedmen’s Bureau agents to ask questions about the early days of Reconstruction, which are surprisingly resonant with the present day: How do you prove something happened in a highly partisan atmosphere where the credibility of information is constantly challenged? And what form should that information take to be considered as fact? Donald Trump has not been the only president...