A night owl, Mr. Obama is known to send e-mail messages well after midnight. Laurence H. Tribe, his Harvard law professor who now serves as an informal adviser, said he received an e-mail message from the candidate at 1:30 a.m. on June 4, when he had received enough delegates to claim the nomination.In interviews with more than two dozen senior advisers, campaign aides and friends, a portrait of Mr. Obama emerges as a concerned but not obsessive manager. By now, his associates have learned, there is no need to deluge him with unnecessary details, so long as someone knows them.
Man of mixed temperament
No state was more important to his candidacy than Iowa, but when he arrived there for campaign visits he stopped aides who tried to give detailed accounts of developments.
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