By Jeffrey Dastin (Reuters) – The road to organizing Amazon’s first union in the United States was a long one for Christian Smalls. The 33-year-old had worked at Walmart, Target and Home Depot. A rapper early in his career, he gave up music to support twin children, and by 2015, he took a warehouse job at Amazon in his home state of New Jersey, and later New York, he said. It was not until the COVID-19 pandemic that Smalls found an unlikely calling: uniting workers at a company that for decades had resisted unionizing, and re-writing a labor playbook in the process. In March 2020, the virus’s …