“How did they do it? Contrary to their own carefully cultivated image, the money did not grow at the grass roots. ‘It wasn’t the Internet,’ said Pritzker. ‘We tapped everybody and did every event we could. He’d do seven events in New York, back-to-back-to-back-to-back.’ Internet donations totaled less than 15 percent of Obama’s fund-raising through 2007. Money only started to cascade through the Web after Iowa in early January 2008, and it would take another several months, as the primaries dragged on, for the grass roots to represent half the campaign’s fund-raising.”
Richard Wolffe – Renegade. The Making of Barack Obama (p. 74).