Vote of Confidence

"I think it shows some real creativity around how to commit their supporters who are really passionate, to buy things to promote the campaign," he says. "It's also a more creative way to raise money, replacing messages like, 'We just need another $10 by midnight!'"

However, both Romney and Obama are potentially minimizing the amount of donations they could get by not consistently putting well-recognized names in the "From" box, such as Vice President Joe Biden pitching for Obama or John McCain for Romney, McDonald says. Instead, some e-mails come from the campaigns' directors of communications, while others come from local or state party leaders.