That pact would reduce Chinese tariffs, abolish Chinese import quotas and licenses, and allow foreign businesses to invest in Chinese banking, telecommunications, and other companies.

In an effort to build support, the House added a provision by Reps. Sander Levin, D-Mich., and Doug Bereuter, R-Neb., for a watchdog commission to monitor human rights and trade policies in China and to make recommendations each year to Congress.

The House bill also includes a mechanism to protect U.S. industries against surges in Chinese imports and a $99 million boost in funds for international broadcasting programs, including Radio Free Asia and the Voice of America.

These measures are not part of the Senate bill.

Sen. Max Baucus, D-Mont., a leading Senate sponsor, said these issues would have to be reconciled with the Senate version--but he predicted in an interview that at least 80 of the 100 senators would vote for passage.

The bill has not been a major issue on the presidential campaign trail, since it is supported by both Vice President Al Gore and Bush, but labor has threatened to make it an issue in the November congressional campaigns.