During a time when the country was bitterly divided over the issue of slavery, the newspapers of the Civil War era frequently crossed the line that separates politics from journalism. It was a period when partisanship was enthusiastically embraced and readers often aligned themselves with party newspapers as eagerly as they aligned themselves with political parties. In his new book , takes a look at this crucial time in our country's history and how Lincoln handled the dominant medium of his day. Harold Holzer, senior vice president for Public Affairs at , talks with us about his new book about Lincoln and the press.