BRET BAIER: This is a Fox News alert. New details on Hillary Clinton's use of a private email server to transmit information, emails, many of it classified, possibly accessible to foreign governments, and the allegations of the use of the family's charitable foundation as a pay-for-play enterprise. Multiple sources telling Fox federal agents are building their cases as we speak.

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They have the federal government's two main law enforcement agencies, the FBI and the Justice Department, essentially at each other's throats.