A lesson and reading material on the Civil War and African American history for the White House chief of staff -- and anybody else who doesn't really get it.

Old Abe, the famed Wisconsin eagle mascot, posed with a color guard after the fall of Vicksburg during the Civil War in 1863. Scientists have solved a century-long controversy: Old Abe was male.

TRUMP: I mean, had Andrew Jackson been a little later, you wouldn’t have had the Civil War. He was a very tough person, but he had a big heart.

Of course the Civil War was about slavery, and everyone knew it at the time. No, Nikki Haley, it wasn’t about states’ rights, except to the extent that Southern states were trying to force ...