Outside the Iowa City show, Adam Angstead, 46, had stepped out of the theater for a cigarette. He works for the Iowa City school district as a substitute teacher five days a week, but he said his employment offers no benefits. On the weekends he works at a diner. Twice a week he sells his blood plasma for extra cash.It’s still not enough. He was trying to pay down his $40,000 in student loans for a while, but it hardly made a dent, and recently he has gotten a deferment. For him, the primary feels like a life-or-death battle.“Being in a room with a bunch of people who think the same thing or close made me think we might not all literally die,” he said. “Bernie’s the only one.”