Polls in Oklahoma have been open for more than seven hours and if opinion polls are any indication, Rick Santorum could be well on his way to taking most of the state's 43 Republican delegates.

If Santorum wins, he will add it to prior wins in Minnesota and Colorado.

In all fairness, the Oklahoma primary seems like a done deal before voting there kicks up a notch, with Santorum well ahead of his rivals.

According to a Feb. 22 Rasmussen Poll, 43 percent of Oklahoma voters said they would vote for Santorum. Newt Gingrich trails with roughly half that with 22 percent and is trailed by Mitt Romney who holds 18 percent of the vote.

Ron Paul brings up the rear with 7 percent of voters.

The state's delegates will be issued to the candidates on a proportional scale, depending on their scale of the leading candidate's victory.

Polls there close at 7 p.m. CST.

Click here to follow the primary results as they roll in.