The rain drizzled down Xavier Messiah, as he and his younger brother waited outside Union Station in St. Louis. Donning their black “Deer Owl Family Farms” hoodies — their family’s cannabis brand — they stood ready with stacks of business cards outside the MJ Unpacked cannabis conference on Nov. 4. “Happy Tuesday!” Xavier exclaimed, as he handed everyone he encountered a business card. “I got that from my father,” he later said.