An internal email that appears to counsel Environmental Protection Agency officials on delaying or obstructing inconvenient Freedom of Information Act requests has sparked congressional demands for an investigation.

Senators David Vitter, R-LA, and Charles Grassley, R-IA, and Rep. Darrell Issa, R-CA, said in a letter today to Attorney General Eric Holder that the investigation should seek to determine if EPA officials stonewall FOIA requests.

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