A brokered convention is a situation in United States politics in which there are not enough delegates 'won' during the presidential primary and caucus elections for a single candidate to have a pre-existing majority, during the first official vote for a political party's presidential candidate at its nominating convention.
Once the first ballot, or vote, has occurred, and no candidate has a majority of the delegates' votes, the convention is then considered brokered; thereafter, the nomination is decided through a process of alternating political horse-trading, and additional re-votes. In this circumstance, all regular delegates (who, previously, were pledged to the candidate who had won their respective state's primary or caucus election) are "released," and are able to switch their allegiance to a different candidate before the next round of balloting. It is hoped that this 'freedom' will result in a re-vote resulting in a clear majority of delegates for one candidate.
Superdelegate votes are counted on the first ballot. Although the term "brokered convention" is sometimes used to refer to a convention where the outcome is decided by superdelegate votes rather than pledged delegates alone, this is not the original sense of the term. Like a brokered convention, the potentially decisive role played by superdelegates can often go against the popular vote from the primaries and caucuses.
Such an occurrence would almost certainly lead to divisiveness in the electorate and should be avoided IMO. Obama should be the easiest incumbent to run against in modern history yet he seems on a course to win reelection with relative ease. God help us...: