The trade rules of the proposed Trans-Pacific Partnership ... would cover nearly 40 percent of the world economy. Access to the text of the proposed deal is highly restricted. At last month's World Economic Forum in Switzerland, U.S. Trade Representative Michael Froman defended the ... refusal to release the full text of the proposed trade pact. It is incomprehensible to me that leaders of major corporate interests who stand to gain enormous financial benefits from this agreement are actively involved in the writing of the TPP, while at the same time, the elected officials of this country, representing the American people, have little or no knowledge of what's in it," wrote Sen. Bernie Sanders, independent-Vt., in a letter to Froman last month. Congressional lawmakers are permitted to view the text of the agreement only in the U.S. trade representative's office, without their own staff members or experts present. They are not allowed to take copies of the agreement back to Capitol Hill for deeper, independent evaluation. Despite those restrictions, specific details of the agreement's text have surfaced from unauthorized leaks. One of the leaks showed the U.S. proposing to empower corporations to attempt to overturn domestic regulations, while ... another leaked provision would help the pharmaceutical industry inflate the price of medicines.