At that point the cheers, mostly from women, swelled so loud that Mrs. Clinton’s remaining words could not be heard.
It was a dramatic — and at times theatrical — end to a candidacy that transfixed the country. Many of her supporters watched, some weeping, turning out to witness and appreciate the history of this latest turn in the Clintons’ story. If it was a clearly personal moment for Mrs. Clinton, it was a political one as well, as she tried to marshal her large following on Mr. Obama’s behalf.