Nate Silver explains why Perry could win the GOP nomination should he enter the contest:
Southern candidates are more likely to win Southern states … than Midwestern candidates are to win Midwestern states, Northeastern candidates are to win Northeastern states, and so on. Southern candidates have also done pretty well outside the South — in part because the South is the nation’s most populous region and 32 percent of presidential candidates since 1972 have come from there. Nevertheless, the ‘home-region advantage’ for a Southern candidate seems to be somewhat larger — perhaps even about twice as large — as those of their peers from other parts of the country
The Dish 