Update 6:50 pm: Polls close in 10 minutes.

Update 7:10 pm: Fox News just called it for Newt Gingrich.

Update 7:15 pm: Via Reuters.

Newt Gingrich won the Republican presidential primary in South Carolina on Saturday, with Mitt Romney behind in second, television networks projected.

Fox News and NBC projected Gingrich, the former speaker of the House of Representatives, as the winner but CNN had not yet called the election.

Gingrich’s victory means that three different candidates have won the first three contests in the state-by-state battle for the Republican presidential nomination to face Democratic President Barack Obama on November 6. Rick Santorum won the Iowa caucuses on January 3 and Romney won the New Hampshire primary on January 10.

Update 7:21 pm: ABC News just called it for Newt as well.

Update 7:23 pm: Women went for Gingrich 36% to Romney’s 30%

Update 7:35 pm: Fox News says Santorum in 3rd, Ron Paul last.

Update 7:53 pm: Looks like Santorum isn’t planning to drop out, announces Florida schedule.

Update 8:11 pm: Santorum: Gingrich “kicked butt.”