Rick Santorum will win the Alabama Republican primary, CNN projects.
Newt Gingrich and Mitt Romney are in a close battle for second.
Forty-seven of Alabama's 50 delegates are tied to the primary, and the state will award those delegates proportionally. A total of 1,144 delegates is needed to clinch the GOP nomination.
Santorum, coming off a big win in Kansas on Saturday, gave himself a boost in the battle to be the conservative alternative to Mitt Romney by beating Newt Gingrich on his home turf.
Mississippi is also holding a primary today, and Hawaii and American Samoa are holding caucuses.
Follow real-time results of these contests on CNNPolitics.com, on CNN's apps and on CNN's mobile website. Follow CNN Politics on Facebook and on Twitter at #CNNElections.
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