https://www.vice.com/en_us/article/pkaa4m/amazon-drivers-are-actually-just-drivers-delivering-for-amazon-amazon-says

Yesterday, drivers for one of Amazon’s delivery service partners in California went on strike to protest Amazon refusing to bargain a contract with them. These drivers, who unionized with the International Brotherhood of Teamsters in late April, are the first drivers within Amazon to go on strike in the U.S.

Motherboard covered this story with the headline, “Amazon Delivery Drivers Walk Out in First-Ever Driver Strike.” This makes sense, given that it is what happened. Delivery drivers who work at an Amazon facility, deliver Amazon packages, and typically drive Amazon-branded trucks, walked out of their Amazon facility. Amazon, however, contests this point.