A new political campaign aims to rally support for the Renewable Fuels Standard (RFS) among presidential candidates as they meet with Iowa voters leading up to next year’s caucuses.

The bipartisan effort, called America’s Renewable Future, comes as the RFS faces continued challenges in Washington, D.C. The campaign will be co-chaired by former Republican state legislator Annette Sweeney and former Democrat Lt. Gov. Patty Judge, along with crop and livestock farmer Bill Couser, and has the full support of Iowa Gov. Terry Branstad.

"I’m looking forward to talking to presidential candidates about how...