That's just a sketch for an alternative reality essay:
After the victory on the Civil War, and after escape from an attempt of murder, the president of the United States, Abraham Lincoln, gives an interview to Karl Marx, from New York Tribune.
After leave London in 1855, Marx is established in Chicago, where he writes for some german-american papers and lectures at Chicago Normal School.
Marx, on his articles, praises Lincoln for his efforts against the slavery.
The B&W sketch is here: [link]