Senator Bernie Sanders, an independent from Vermont, center, speaks outside the Retail, Wholesale and Department Store Union (RWDSU) headquarters in Birmingham, Alabama, U.S., on Friday, March 26, 2021. In a closely-watched election, workers at Amazon.com Incs Bessemer, Alabama, fulfillment center began voting seven weeks ago on whether to join the RWDSU in a contentious effort to form a union. Photographer: Andi Rice/Bloomberg via Getty Images