The leaders of Iowa’s leading ag organizations, including Craig Hill, president of the Iowa Farm Bureau Federation, last week urged the Trump administration to defend market access for U.S. farmers as it works to modernize the North American Free Trade Agreement (NAFTA).

"For Iowa agriculture to thrive, we need trade agreements that recognize how important it is that the U.S. meat and grain industries, including beef, pork, corn, soybeans and biofuels, have market access at a competitive level in North America and across the globe," the Iowa ag...