Republican presidential candidates prepared Tuesday for their first major test of the primary season, making last-minute whistle-stops throughout Iowa in hopes of swaying many undecided caucus-goers.
Later tonight, Iowa Republicans will gather to cast ballots for the person they want to stand against President Obama in November. But after a bruising months-long campaign, more than a third of those participating in the caucuses say they still haven't made up their minds.
GOP presidential candidate Michelle Bachmann wrapped up her bus tour of Iowa's 99 counties Thursday. She's been on the road for most of the last two weeks in a final push to generate support before Tuesday's caucuses.