CNN's John Sutter spoke with Ed Rollins and Joe de Manuell Hall about the train derailment in South Carolina. The pair had been working on a campaign to unionize a Walmart warehouse, which is when you start working for a workplace with the intent to unionize it. When rail is tightly regulated, even though it was deregulated, there still is the empty shell of the Interstate Commerce Commission, they say. "It really seemed like an opportunity for us to converge on different threads that we've been thinking about," says Rollins.