Sophie Stoffers carried groceries to her car in a Sioux Falls Hy-Vee parking lot and pondered a question from a reporter.Would Initiated Measure 28, an effort on the Nov. 5 ballot to eliminate South Dakota’s sales tax on food, make life better for her?“I’m always a fan of saving money,” said Stoffers, 24, who recently moved to Sioux Falls and works as an assistant athletic...