Sen. Hillary Clinton says her husband made mistakes related to the North American Free Trade Agreement.
Her comment came in response to a question by a union worker at a summit sponsored by the Alliance for American Manufacturing in Pittsburgh. The worker says President Clinton tricked them when he championed NAFTA during his presidency.
Clinton says her husband is smart, but he does make mistakes. She says she would correct the mistakes related to NAFTA or pull the United States out of the agreement.
Some voters say NAFTA has taken away U.S. jobs.
Earlier, Sen. Barack Obama questioned Clinton's sincerity in her opposition to trade agreements.
The two are competing for the backing of organized labor in Pennsylvania's April 22 primary.