The GOP presidential candidates are fighting to win over conservative voters in the Bible Belt as the race takes on a more prominent Southern focus.

After bowing out of recent contests north of the Mason-Dixon line, Newt Gingrich is staking his entire campaign on a big victory Tuesday in Georgia, where the onetime House speaker represented a suburban Atlanta district for 20 years. Rick Santorum is making inroads in Tennessee with a message that the state’s evangelical voters should feel right at home with the former Pennsylvania senator’s socially conservative views.