Free trade has become a key issue in the U.S. presidential campaign in the past several weeks, especially in the heated contest to become the Democratic party's nominee.

Amid the loss of manufacturing jobs in [the U.S. Midwestern state of] Ohio, the two Democratic party contenders have suggested renegotiating the North American Free Trade Agreement. As VOA's Jim Fry reports, the two candidates see the trade issue as key to winning the support of Ohio workers.