A button supporting Republican presidential candidate and former US House Speaker Newt Gingrich is pictured on a voter's shirt at his South Carolina primary election night rally in Columbia, South Carolina, January 21, 2012. [Photo/Agencies]

OLD TIMER WITH EXPERIENCE  

"He is an old timer with a lot of political experience. He's the only one who can beat Obama," said Jim Walters, a retired marine owner in the town of Aiken.    

Gingrich slammed Obama as "truly a danger to the country" in his South Carolina victory speech and promised to bring down Obama in a series of long debates.

A master of the sharp turn of phrase who talks in big broad sweeps, the former House speaker was the clear star of the more than 20 Republican debates in recent months.

He left Romney floundering, particularly during two televised contests in South Carolina this week where the millionaire former executive stumbled over questions about his personal finances.

Republican voters in South Carolina, a conservative state with a taste for rough and tumble politics, lapped it up.

"I think a lot of it has to do with the fact that people really want to see Newt debate Obama," Mackowiak said.

"It reminds me of gladiators. You see an amazing gladiator have a string of victories in the middle of the Coliseum so you really want to see him go up against the biggest, baddest gladiator there is."

In a sign that Gingrich's well-documented marital infidelities might have created a problem with female voters, exit polls showed Gingrich held an advantage over Romney of 16 points among men but only 9 points among women.