Wow, don't tell any actual Southerners that you consider D.C. Southern. *I'm* not Southern enough for many of them, and at least my state fought on the correct side of the Civil War to earn that title. (Okay, so Maryland was kept under martial law to prevent it from joining the C.S.A.)

And D.C. was a COMPROMISE, as being about halfway in the middle of the then existing states, north and south. (Also, it was swampland, but that doesn't have much to do with this.)