In Decision 2012, it's the last minute push in Iowa as the candidates look to pull voters in their direction.
It's very possible the candidate who will take the GOP nomination is tonight's winner.
Michelle Bachmann kicked off a morning Rock the Caucus event at a high school in West Des Moines.
She told the students, "Today is going to be a great day. History is going to start here today."
For hundreds of the students at the event, this will be their first time participating in a caucus.
Senior Connor Grandquist told Local 2, "I'm looking forward to getting into the process of caucusing because I've been researching the candidates and looking at what I like for each one."
If "applause-o-meters" mean anything, Ron Paul's resounding welcome could be an indicator the Texas congressman might have the young vote.
Paul told the audience, "We see this as a real opportunity, this campaign and what's coming up tonight and the next several months."
Frontrunner Mitt Romney sent his four sons.
Tagg Romney began by saying simply, "Listen, I'm here to brag about my dad for a few minutes."
But Rick Santorum isn't going down without a fight.
Heading out, he told Local 2, "I feel very good about things."
KPRC Local 2 caught up with Rick Perry at a town hall meeting in Des Moines.
When asked how he's feeling about the upcoming caucuses, he told Local 2, "Everything is great. Everything is good."
Lagging in the polls, he stayed on message asking Iowans, "Who will stand up for those fiscally conservative principals? Who will get America back so it can be this powerful economic force again?"
Lt. Gov. David Dewhurst was at Perry's side.
He told Local 2 that while in Iowa, "I've been talking to friends. I'm going to be speaking at one of the caucuses tonight."
The caucusing processes begins at 7 p.m. and results will come a few hours later.