Republican Presidential hopefuls Mitt Romney, Rick Santorum, Newt Gingrich and Ron Paul head to the Badger State tonight for the Wisconsin GOP Primary, one of three Republican primaries on the evening.

You can keep track of the results of the Wisconsin primary live online here:

Here’s more on tonight’s primary:

A full three months into the primary season (that’s right, folks: Iowa was three months ago today), Ron Paul and Newt Gingrich are still alive and kicking. Of course, three months ago, the bigger surprise would be that Santorum hadn’t shot himself in the foot and was actually one of the two front-runners for the Republican Presidential Nomination.

But that may well be over by the time tonight’s primaries in Wisconsin, Maryland and Washington, D.C. are over – even though the 98 delegates up for grabs tonight can’t win Mitt Romney the nomination, they can all but lock it up for the former Massachusetts governor, who’s already got an almost 300 delegate lead over Santorum and is racking up support from political figures past and present all over the place lately.

After tonight, the delegates have three weeks to campaign in the Northeast, as the next primaries – those in New York, Pennsylvania, Connecticut, Rhode Island and Delaware – don’t take place until April 24th.

Here’s more on tonight’s primaries from Politico:

It’s not a novel idea, but it’s an important one. If Santorum ekes out a win over Romney, it will be a surprise, come-from-behind victory in the last Midwestern state where the Pennsylvanian has a shot. It’s a coup that would be very unlikely to change the outcome of the GOP race, but which would certainly make it hard for the front-runner to declare game over.

If Romney wins, as he’s expected to do, the question will be his margin.

“Is he going to get double digits?” said Charlie Sykes, a well-known and highly-influential conservative radio host in Wisconsin.

With support from Rep. Paul Ryan and Sen. Ron Johnson, Romney has, he noted, “the entire conservative infrastructure of the state…that ought to be very influential with the primary voters.”