Politico's Ben Smith posted the FBI agent's affidavit in the alleged plot to interfere with the phones* at Sen. Landrieu's office by O'Keefe and three others to his Twitter account this afternoon. You can read it here (pdf).
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*Correction: This post inaccurately stated that James O'Keefe was arrested in an alleged plot to wiretap Sen. Landrieu's office. The error was based on media reports (such as this one). The FBI affidavit actually alleged that O'Keefe and the others arrested were engaged in a plot to “interfer[e]” with Landrieu's telephone system. We regret the error.