The NebraskaDemocratic Presidential Caucuses took place on February 9, 2008, where 24 of the state's 31 convention delegates were chosen. Like he did throughout many other states that held caucuses instead of primaries, Barack Obama won the Nebraska Democratic Caucus by more than a two-to-one margin of victory over Hillary Rodham Clinton. On May 13, 2008, the state also held a non-binding primary election which Obama also won but the margin of victory was considerably smaller.
The Nebraska Democratic Caucus was open to all registered Democratic voters. Voters who were eligible to vote in the general election but were unregistered or registered with another party could register as Democrats at the caucus. Absentee votes for the disabled, those on active military duty, and full-time students were permitted.
After signing in, participants gathered into preference groups for each candidate. A minimum 15 percent of participants was required for viability. Only members of non-viable groups were permitted to realign to other viable groups. Afterwards, delegates were divided and elected to the county conventions in June.
The primary election held on May 13 was not binding on any county delegates, all of whom had been selected at the caucuses. However, it may have played a role in showing superdelegates to the Democratic National Convention the preference of Nebraska Democrats.
County delegates were committed to vote in the county conventions for the candidate they had supported during the caucuses. However, the same viability rules applied as at the precinct caucuses. The county conventions elected delegates to the Nebraska Democratic Party State Convention which took place June 20–22, who then elected delegates to the Democratic National Convention. The State Convention chose eight delegates pledged to Clinton and 16 pledged to Obama, the same number as the estimates following the main caucuses.
Barack Obama performed extremely well throughout the state of Nebraska in the caucus, winning a majority of counties. His large margin of victory can be attributed to his overwhelming wins in Douglas County, which contains Omaha, where he won with 77.12 percent of the vote, as well as in Lancaster County, which contains the state capital of Lincoln and is home to the University of Nebraska. Most of Clinton's wins in the state came in the far more rural counties in Western Nebraska. However, during the non-binding primary, Clinton carried almost every county in Nebraska except for Douglas and Lancaster counties which gave Obama the edge and narrow victory.