To get a better sense of why it has succeeded, I opted to undergo the full tech immersion while reporting this piece, and soon had Obama ring tones on my phone, new networks of online “friends,” text-message updates from the campaign, and regular e-mails from its manager, all gently encouraging me to give money, volunteer time, bring in new friends, and generally reorient my life in ways that were made to seem hip and fun—and inexorably aimed at the greater glory of Barack Obama. How Obama arrived at this new model for campaigning is a tale of foresight and circumstance, his campaign’s enterprise and his opponent’s shortsightedness, and it has as much to do with Silicon Valley as it does with Washington politics.