Answer: labor unions who feared the loss of American jobs to Mexico
Step-by-step explanation:
Labor Unions were very opposed to the signing of the North American Free Trade Agreement (NAFTA) by the Clinton administration because they reasoned that it would lead to job losses as companies moved to Mexico to take advantage of cheaper labor rates.
They would ultimately be proven right as U.S. factories moved to Mexico in droves especially in the auto industry. This led to job losses in the United States and prompted former President Donald Trump to call it one of the worst deals the U.S. had ever signed.