PRO PUBLICA: Three Things We Don’t Know About Obama’s Massive Voter Database.

President Obama’s re-election campaign is reportedly building a massive database of information about potential supporters.

The database seems to bring together information about supporters gathered from all branches of the campaign — everything from an individual’s donation records to volunteer activity to online interactions with the campaign — aimed at allowing the campaign to personalize every interaction with potential supporters. . . . Is there any way to erase yourself from the campaign’s database? As far as we can tell, no.

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Knowledge is power.