With the count almost complete in the Iowa Republican caucus, Mitt Romney and Rick Santorum have emerged as front-runners. The candidates have given their reactions on the results.

This is a campaign night where America wins. The gap between his (President Obama's) promises four years ago and his performance is as great as anything I've ever seen in my life, Romney, the former Massachusetts governor, said, adding, On to New Hampshire.

Santorum, a former Pennsylvania Senator, declared: Game on! and went on to praise his faith and his family for the success.

After finishing third in the caucus, Ron Paul stated he was satisfied with the result and promised to fight on in the next primary.

I think there's nothing to be ashamed of, everything to be satisfied, and be ready and rearing to move on, onto the next stop, which is New Hampshire, Paul said. We're three tickets out, which is obviously true, and one of two that can actually run a national campaign and raise the money, he added.

Michele Bachmann stated she was staying in the presidential race despite her bleak performance in the Iowa caucuses.

I believe that I am that true conservative who can and who will defeat Barack Obama in 2012, Bachmann said. What we need is a fearless conservative, one with no compromises on their record on spending on health care, on crony capitalism, on defending America, on standing with our ally Israel, she added.

We are not going to go out and run nasty ads, said Newt Gingrich, who finished fourth.

Meanwhile Texas Governor Rick Perry, who finished fifth, said he was returning to his home state in order to determine whether there was a path forward for him in this race.