On Tuesday, voters in Wisconsin head to the polls to pick their candidate for the Republican presidential nomination. While the Gov. Scott Walker recall fight has dominated state politics and commanded national attention for months, attention turns now to the remaining four candidates for the GOP nomination. With more than half the country behind them, opportunities to catch front-runner Mitt Romney are running out.
* Wisconsin has 42 delegates to the Republican National Convention. States with a similar number include Indiana (46), Oklahoma (43) and Massachusetts (41).
* Unlike most states, all of Wisconsin delegates will be allocated by the results of the vote. Each of Wisconsin's eight congressional districts has three delegates each. The candidate with the highest vote total in each district wins them all.
* Fifteen at-large delegates are awarded to the candidate with the highest statewide vote total.
* The remaining three delegates are party leaders (the state party chairman, national committeeman and national committeewoman) bound to the candidate that wins the statewide vote.
* Wisconsin uses an open primary system. Any registered voter can vote in the primary contest of their choice, regardless of their political affiliation or lack thereof. Voters may register to vote at their polling place on Election Day, providing they have proof of identity. A complete list of requirements is available on the Wisconsin Government Accountability Board website.
* Absentee ballots are due by 8 p.m. on Election Day, whether hand delivered or mailed.
* The four remaining candidates (Rick Santorum, Ron Paul, Newt Gingrich and Mitt Romney) will appear on the ballot with former candidates John Huntsman and Michele Bachmann.
* According to polling data aggregated by RealClearPolitics.com, Romney is in excellent shape heading into the voting. In the last week, four polls show him with a lead anywhere from 5 percent to 10 percent ahead of Santorum. The most recent poll, by Rasmussen, gives Romney a 44 percent to 34 percent lead. Gingrich and Paul trail with 7 percent.