4. The suburbs

Louisiana is the least rural Southern state to vote so far.

According to 2008 exit polls, 22 percent of voters came from urban areas and 59 percent came from the suburbs. That means just 19 percent came from rural areas — a number far lower than any other Southern state.

“While Santorum holds a natural edge, particularly in central and northern parts of the state, Romney is helped by Gingrich’s presence on the ballot,” said Lenny Alcivar, a GOP strategist from Louisiana. “Meanwhile, suburban voters eager to defeat Obama may be more inclined to support Romney than they otherwise would.”

5. Mississippi

While the more rural parts of Louisiana may be more demographically friendly to Santorum than Romney, take a look at what happened in Mississippi…