MIAMI (CBSMiami) – You better hurry if you plan to vote in the Jan. 31st Republican presidential primary in the state of Florida. Tuesday is the deadline to register to vote in that primary.

Voter registration or party change forms must be postmarked by Tuesday or delivered to the elections office by 5 p.m.

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You must be at least 18 years old and a U.S. citizen.

Florida’s primary is closed, which means only registered Republicans can take part in the January 31st primary. You can register at county elections offices, public libraries, and driver’s license offices.

Those who do head out to vote will face a decision among GOP frontrunners that include Newt Gingrich, Mitt Romney, Ron Paul, and Rick Santorum.

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Gingrich surged ahead in early December 2011, but millions of dollars were poured into attack ads in Iowa and Gingrich suffered in late December polling.

The most recent polling out of Florida showed Romney and Gingrich running neck and neck in the Sunshine State.

If Gingrich loses badly in Iowa, he will turn his hopes towards capturing South Carolina where he has a big lead. Then, all eyes will turn towards Nevada and Florida in the GOP primary calendar.

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For more information on how to register in Broward County, click here. For Miami-Dade County, click here.