Sen. Bernie Sanders has told a packed house in Des Moines that as president his power to reform industries and institutions would be limited, but he’d still fulfill his campaign promises with their support. Sanders said “no president, not the best-intentioned in the world, can take on those extraordinarily powerful forces.” He went on to say: “But we have something they don’t have — we have the people!”

The crowd packed into the Animal Learning Center on the Iowa State Fairgrounds roared their approval of Sanders, who is making another run for the Democratic nomination. Many were decked out in his 2016 campaign gear or waved “IA loves Bernie” signs.

About 50 volunteers showed up to support the Vermont senator at the final stop of his three-day swing through the state, part of an Iowa volunteer force that Sanders said already totals 7,000. “We need you to add to that number!” he said, to roars from the crowd.