A customary ceremonial practice has been for the losing candidate(s) in the primary season to "release" their delegates at the convention and exhort them to vote for the winning nominee as a sign of party unity. Thus, the vote tallied on the convention floor is unanimous or nearly so. For example, during the 2008 Democratic National Convention, Hillary Clinton (who only captured about 22% of delegates compared to Barack Obama's approximate 72%) moved to nominate Obama by acclamation, making it a unanimous vote.