Irvin Rosenfeld, as one of only a few surviving federal medical marijuana patients was in Montana, stumping for what he calls a 'Wonderdrug.' Every month, the federal government sends Rosenfeld his medicine: 360 rolled marijuana cigarettes. He suffers from a rare disorder that produces tumors at the end of long bones. "I haven't developed a new tumor or had an existing one grow since I was 21, which was 37 years ago, and I attribute that to my medicine: medical cannabis," he said.