The UPS&#x27;s union is the Teamsters, who Amazon definitely does not want to deal with.<p>The Teamsters have already picked their side in this battle anyway.  <a href="https:&#x2F;&#x2F;teamster.org&#x2F;news&#x2F;2015&#x2F;06&#x2F;sinister-motives-lurking-beneath-amazoncoms-minnesota-debut" rel="nofollow">https:&#x2F;&#x2F;teamster.org&#x2F;news&#x2F;2015&#x2F;06&#x2F;sinister-motives-lurking-b...</a>