GMO labeling: A tale of two Montana lawmakers

Montana's lone member in the U.S House of Representatives and its senior senator are finding themselves on opposite sides in the debate over whether genetically modified foods should be mandated to carry a label. The Safe and Affordable Food Labeling Act, which passed the House 275-150 last Thursday, would establish a single national standard for determining which products containing GMOs should be required to have a label.

Rep. Ryan Zinke, R-Mont., was among the group supporting the legislation that included 45 Democrats and all but 12 Republicans.

"With more folks than ever looking a...