Since 1972, the Iowa caucuses have had a 55% success rate at predicting which Democrat, and a 43% success rate at predicting which Republican, will go on to win the nomination of their
political party for president at that party's national convention.
2004 Since Republican President
George W. Bush did not face any opposition in 2004, only Democratic caucuses were held. The meetings ran from 6:30 p.m. until approximately 7:00 p.m. on January 19, 2004, with a turnout of about 124,000 caucus-goers. The county convention occurred on March 13, the district convention on April 24, and the state convention on June 26. Delegates could and did change their votes based on further developments in the race; for instance, in 2004 the delegates pledged to Dick Gephardt, who left the race after the precinct caucuses, chose a different candidate to support at the county, district, and state level. The number of delegates each candidate receives eventually determines how many state delegates from Iowa that candidate will have at the
Democratic National Convention. Iowa sends 56 delegates to the DNC out of a total of 4,366. Of the 45 delegates that were chosen through the caucus system, 29 were chosen at the district level. Ten delegates were at-large delegates, and six were "party leader and elected official" (PLEO) delegates; these were assigned at the state convention. There were also 11 other delegates, eight of whom were appointed from local Democratic National Committee members; two were PLEO delegates and one was elected at the state Democratic convention.
John Kerry won the Iowa caucuses with 38% of the vote,
John Edwards coming second.
2008 The
2008 Iowa Democratic caucuses and
2008 Iowa Republican caucuses took place January 3 at 7 p.m. CT. Candidates spent tens of millions of dollars on local television advertisements and hundreds of paid staff in dozens of field offices.
Barack Obama (D) and
Mike Huckabee (R) were the eventual winners.
2012 The 2012 Iowa caucuses took place on Tuesday, January 3, starting at 7 p.m. CST. Incumbent president
Barack Obama only faced minor opposition in the Democratic caucus and received 98% of the vote, but the Republican caucus was heavily contested between several challengers. Initial results reported that Mitt Romney beat out Rick Santorum by just 8 votes, but when the final results came out two weeks later Rick Santorum secured the victory over Romney by a margin of 34 votes with Ron Paul in a strong 3rd. Results were certified by the Caucus, but not by the Republican party, who declared it a split decision due to missing reports from 8 precincts, but who later certified the caucus as a win for Santorum. The caucus winner changed yet again when the Iowa delegate totals were finally determined giving Ron Paul the win along with several other states that same weekend.
2016 The 2016 Iowa caucuses took place on Monday, February 1. The counting started at 7 p.m. CST and lasted one hour, after the caucus discussions. For the first time, results were electronically sent to both Democratic and Republican headquarters. In the Democratic caucus,
Hillary Clinton received 45% of the vote and 23 pledged delegates, defeating
Bernie Sanders, with 41% and 21 delegates. The Republican caucus awarded delegates to nine candidates: 8 to
Ted Cruz, with 28% of the vote; 7 each to
Donald Trump and
Marco Rubio, with 24% and 23% respectively; 3 to
Ben Carson, with 9%; and 1 delegate each to five other candidates.
2020 The 2020 Iowa caucuses occurred on Monday, February 3. The results of the 2020 Iowa Democratic caucus were delayed due to "inconsistencies in the reporting of three sets of results," according to Mandy McClure, the party's communications director. "In addition to the tech systems being used to tabulate results, we are also using photos of results and a paper trail to validate that all results match and ensure that we have confidence and accuracy in the numbers we report. This is simply a reporting issue, the app did not go down and this is not a hack or an intrusion. The underlying data and paper trail is sound and will simply take time to further report the results." Delays in reporting were attributed to the failure of a new reporting app for the Iowa Democratic Party presidential caucus, including an inability to download or launch the app as well as an inability for the app to function well once launched; the failure of the backup phone number system after too many people attempted to call the phone number due to the failing app; and confusion over the correct way to count and calculate the initial and final popular votes as well as state delegate equivalent values. A complete official count of the first alignment popular vote, the second alignment popular vote, and state delegate equivalents was released on February 6, 3 days after Iowa Democrats voted. However, various outlets including
The New York Times and
NBC News reported logical inconsistencies in certain precincts (such as state delegate equivalents being awarded to the wrong candidates and more people voting for the second alignment than the first alignment). This led the Democratic National Committee chairman
Tom Perez to request the state Democratic Party (which runs the caucuses) to "recanvass" or recalculate the results including state delegate equivalents. The app in question was provided by a 5-month-old company,
Shadow Inc., which failed to develop and test the product adequately. The CEO and founder,
Tara McGowan, also founded the
ACRONYM corporation in 2017 and
Courier Newsroom in 2019. Her husband, Michael Halle, is a senior strategist to the campaign of Pete Buttigieg. Multiple unverified claims of the Buttigieg campaign funding the organization, having investment interests in, and even sharing partial ownership in either company have been made. However, the only verified transactions between the Buttigieg campaign and either entity is a contract for text and messages services. The Joe Biden campaign had also contracted with Shadow, Inc for the same services, as well as former candidate Kirsten Gillibrand. After the app failure, McGowan distanced herself and ACRONYM from Shadow Inc., stating that it was an "independent" entity. Both companies are founded and directed by McGowan and Halle, and they share the same registered address. While the corporation's official website doesn't officially name its members, data gathered from LinkedIn reveals that its top executives were all involved in one way or another with Hillary Clinton's 2016 election campaign. James Hickey (Shadow, Inc.'s Chief Operating Officer) and Krista Davis (its Chief Software Architect) were both vital to the digital aspect of her campaign.
2024 The 2024 Iowa Republican presidential caucuses were held on January 15, 2024, with 40 delegates to the
2024 Republican National Convention allocated on a proportional basis. The winner was
Donald Trump, followed by
Ron DeSantis and
Nikki Haley. Iowa's Democratic presidential caucuses had in-person gatherings on January 15 focusing only on party business. Voting on candidates will be done exclusively via
mail-in ballots from January 12 until
Super Tuesday, March 5, 2024. This was the result of a compromise between the Iowa Democratic Party and the Democratic National Committee. Iowa traditionally holds its race first during the presidential primary and caucuses season, but the DNC originally wanted South Carolina to instead hold its race first on February 3. 46 delegates to the
Democratic National Convention will be allocated to presidential candidates. ==Democratic results==