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WASHINGTON — Progressive Democrats in Congress are ramping up pressure on the Obama administration to release the text of Trans-Pacific Partnership, a secretive free trade agreement with 10 other nations, amid intensifying controversy over the administration’s transparency record and its treatment of classified information.

The only publicly available information on the terms of the deal has come from leaks, some of which have alarmed public health experts, environmentalist groups and consumer advocates. According to a document leaked in the summer of 2012, the deal would allow corporations to directly challenge government laws and regulations in international courts.

Members of Congress have been provided with only limited access to the negotiation documents. Rep. Alan Grayson (D-Fla.) told HuffPost on Monday that he viewed an edited version of the negotiation texts last week, but that secrecy policies at the Office of the U.S. Trade Representative created scheduling difficulties that delayed his access for nearly six weeks. The Obama administration has barred any Congressional staffers from reviewing the full negotiation text and prohibited members of Congress from discussing the specific terms of the text with trade experts and reporters. Staffers on some committees are granted access to portions of the text under their committee’s jurisdiction.

“This, more than anything, shows the abuse of the classified information system,” Grayson told HuffPost. “They maintain that the text is classified information. And I get clearance because I’m a member of Congress, but now they tell me that they don’t want me to talk to anybody about it because if I did, I’d be releasing classified information.”