[Atlas Sneezed]

why is there a blue line in the center of alabama that extends into eastern missippi? that one has me stumped.

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I'd guess that mid Alabama and the lower Mississippi valley are low-density areas populated predominantly by blacks.

[mlocher]

the line has no apparent freeway and seems to be between montgomery and birmingham. your hypothesis makes sense to me.

[Blessed]

All of the rural counties in the south that are blue are small agrarian counties with majority black populations.Look at the Miss.River. The flood plain on both sides is blue.