The average donation was $96 and over 218,000 of those contributing were first time donors to the campaign.
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Obama's presidential campaign now has more than 1,276,000 donors.
The Clinton campaign is expected to report $20 million for the March, although she has not formally released her numbers yet. The deadline to do so is April 15.
Clinton spokesman Howard Wolfson told reporters on a conference call. "Both of these campaigns are raising a considerable amount of money. We are both outraising Senator McCain."
McCain has not released their March numbers yet, either.
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