Robert Siegel talks with Sidney Milkis, author of Theodore Roosevelt, the Progressive Party, and the Transformation of American Democracy, about the U.S. presidential election of 1912 — when there was a viable third party on the ballot: the Bull Moose Party.
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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