Answer:
They worried about losing jobs to developing countries where workers could be paid less.
Explanation: In 1993, Congress ratified the North American Free Trade Agreement (NAFTA), which had been negotiated by President Bush. The agreement added Mexico to the US-Canadian free trade zone. Many feared that the treaty would lead to the loss of US jobs to lower-wage workers in Mexico, but Clinton felt opening more trade in Mexican markets would increase prosperity in the United States.