The Times has interviewed 93 party officials — all of them superdelegates, who could have a say on the nominee at the convention — and found overwhelming opposition to handing the Vermont senator the nomination if he arrived with the most delegates but fell short of a majority.

Such a situation may result in a brokered convention, a messy political battle the likes of which Democrats have not seen since 1952, when the nominee was Adlai Stevenson.