Colombia's President Alvaro Uribe is calling on U.S. officials and lawmakers to help win approval for a set of trade measures between the nations.

Mr. Uribe met with U.S. Trade Representative Susan Schwab in Washington on Monday, to discuss the trade agreements. He was set to hold talks with several lawmakers Tuesday.

President Bush is expected to sign a new free trade deal between the nations on November 22. The agreement must then be approved by Congress. Some Democratic lawmakers, however, say the deal should do more to protect workers.

Colombia also is pressing for renewal of a set of preferential tariffs which are set to expire at the end of the year.

President Uribe warned that some U.S.-based companies have already canceled business contracts because of uncertainty over the tariffs.

The trade duties are part of a deal, the Andean Trade Promotion and Drug Eradication Act, intended to aid Andean nations that cooperate in U.S.-led efforts to battle illegal drug trafficking.

Some information for this report was provided by and Reuters.