2012 Iowa Caucuses

Jan. 3: Jonathan Jackson, a volunteer with the Ron Paul campaign, hands out buttons at the Black Hawk County Republican caucuses site at the UNI-Dome in Cedar Falls, Iowa.  (AP)

Jan. 3: Mary Keys of Cedar Falls, Iowa folds Newt Gingrich shirts at the Black Hawk County Republican caucus site at the UNI-Dome in Cedar Falls, Iowa.  (AP)

Jan. 3: Precinct captain Barbara Hatinger works on paperwork before the doors are opened for the Black Hawk County Republican caucuses site at the UNI-Dome in Cedar Falls, Iowa. (AP)

Jan. 3: Republican presidential candidate, Rep. Michele Bachmann, R-Minn., left, greets caucus-goers at the Black Hawk County Republican caucuses site at the UNI-Dome in Cedar Falls, Iowa. (AP)

Jan. 3: Caucus-goers arrive at the Black Hawk County Republican caucuses site at the UNI-Dome. (AP)

Jan. 3: Voters debate during a caucus of precinct 42 near Smithland, Iowa. Former Massachusetts Gov. Mitt Romney, Texas Rep. Ron Paul and former Pennsylvania Sen. Rick Santorum shared the straw poll ballot with former House Speaker Newt Gingrich, Texas Gov. Rick Perry and Minnesota Rep. Michele Bachmann in a caucus race as jumbled as any in the 40 years since Iowa gained the presidential campaign lead-off position. (AP)

Jan. 3: Chris Kreger and John Carr talk outside a caucus at precinct 42 near Smithland, Iowa.  (AP)

Jan. 3: Voters sign in on caucus night at Point of Grace Church in Waukee, Iowa.  (AP)

Jan. 3: Brent Gernant, left, and Denise Kremer help check in participants in Waterloo's Ward 5 Precinct 4 at the Black Hawk County Republican caucuses site at the UNI-Dome. (AP)

Jan. 3: David Caccioli announces the results from Coralville, Iowa, precinct 4 at the Coralville Marriott Iowa Caucus. (AP)