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Allegations of 2nd affair with Florida official who sought congressman's help.
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The NY Attorney General is investigating the company's expenditures.
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Cabinet secretaries, top officials deployed for political events, says report.
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Pursuing reports Mahoney paid hush money to alleged mistress.
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Panel "puzzled" by use of executive privilege to shield documents.
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Fired by Palin, Walt Monegan says he wants to clear his good name.
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Congressman says he has violated no laws as ethics investigation begins.
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Campaign media firm ends work for Florida Congressman after ABC News report.
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Tim Mahoney was elected to remove the 'ethical cloud' of Rep. Mark Foley.
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Data shows donations of up to $3.3 million to Obama could come from abroad