Hillary also has the white blue collar vote outside of the South. If Obama is nominated, he loses that vote, and we get PA, OH, and possibly even NJ.
Obama tends to do well in places in which blacks are large enough to determine the outcome or when blacks are thin on the ground.
Obama does poorly in places when other races have to rub shoulders with blacks. Sad that race is still a factor today. I want Obama smacked down for being a Marxist, not as a black man.