Iowans are preparing to participate in the state's first-in-nation presidential contest. NPR national political correspondent Mara Liasson joins Robert Siegel to talk about Tuesday's Iowa caucuses — how they work and what they might mean.
Republican presidential hopefuls were bearing down and trying to sway voters hours ahead of the first major test of the primary season. But more than a third of those participating in the state's caucuses say they still haven't made up their minds.
After months of campaigning, it's finally caucus day in Iowa. Polls still show a fluid race, with former Massachusetts Gov. Mitt Romney, Texas Rep. Ron Paul and former Pennsylvania Sen. Rick Santorum heading the pack.
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