Surprise phone calls and 'selfie lines': Inside Elizabeth Warren's grassroots strategy

The Campaign Legal Center's Brendan Fischer told CNN that Warren's announcement foregoing all solicitation of wealthy donors was a "meaningful pledge." "A candidate voluntarily limiting the amount of time they spend asking wealthy donors for money is a real financial sacrifice, and can have a real impact on the way that money influences our political system," Fischer said. Warren has readily acknowledged the challenges of this person-to-person and small-dollar focused grassroots model. She recently told reporters in Iowa that she was no doubt "leaving money on the table."

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