Moulton in Iowa
National service: Moulton’s approach to higher-education costs and climate change is more innovative, if a bit idealistic. He calls for a massive national service program, which would be voluntary for all Americans between the ages of 17 and 24. The federal government would pay for college or job training based on years of service. The volunteers might tackle jobs related to climate change, such as shoring up levees or making buildings more efficient.