MONTERREY, Mexico (Reuters) - The Bush administration will not renegotiate a controversial free-trade pact with Central America despite strong opposition from labor groups and the sugar industry, U.S. Commerce Secretary Carlos Gutierrez said on Friday. As President Bush stepped up his bid this week for congressional approval of the U.S.-Central America Free Trade Agreement, or CAFTA, Gutierrez told Reuters the plan would not go back to the drawing board even though lawmakers are skeptical of its ability to pass. "It's a treaty that has already been negotiated and even approved by the congresses in three Central American countries," Gutierrez said...