Washington DC - One of the nation's largest unions, the International Brotherhood of Teamsters, announced it will mount a nationwide effort to organize Amazon's delivery and warehouse workers, declaring that the multibillion-dollar behemoth is an "existential threat" to workers across the logistics industry.

In a resolution presented on Tuesday at its 30th international convention, the 1.4 million member union proposed to fully fund and "supply all the resources necessary" to help Amazon workers organize.

The announcement coincided with Amazon's annual sales bonanza Prime Day, and comes in the wake of a stunning defeat for the labor movement and its progressive allies.

In April, Amazon workers at a giant Bessemer, Alabama warehouse voted overwhelmingly against representation by the Retail, Wholesale, and Department Store Union after a fierce anti-union campaign spread and was purported by the company.

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"Amazon exploits its employees, contractors, and employees of contractors via wage theft, fraudulent classification, intense production quotas, dehumanizing work environments, unsafe workplaces and production standards, low wages, high turnover, no voice on the job, lack of job security, and outsourced jobs," the Teamsters' resolution said on Tuesday.

The Teamsters' 500 local chapters are expected to meet online to approve the initiative on Thursday.

Amazon did not respond to a request for comment.

With one million workers, the Seattle e-commerce giant is on pace to be the nation's biggest company, capturing market share from UPS, the Teamsters' largest unit, and other logistics companies.

It is already one of Southern California's largest employers, transporting goods from the sprawling ports of Los Angeles and Long Beach to destinations across the US.

At least at first, the Teamsters will reportedly bypass the standard approach to union organizing which uses facility-by-facility elections under the National Labor Relations Board. It has been widely criticized as favoring employers.

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"We chose not to go down the path of an NLRB election for the reasons that were validated in the Bessemer union election," National Teamsters Director for Amazon Randy Korgan told Vice this week.

"The list is very long in how workers can seek justice on the job. The NLRB is not the only way," he added.

Instead, the Teamsters are mobilizing their members at UPS and other companies to form alliances with community groups and help train Amazon workers to advocate for their workplace rights.

It is an effort that has already been underway in Southern California's Inland Empire, where Amazon is the largest employer, and other regions.

Unionizing any part of Amazon's exploding workforce is a brutal challenge. The company's giant workforce has a high worker turnover rate, which makes organizing difficult.

"Building genuine worker power at Amazon will require shop-floor militancy by Amazon workers…in addition to unquestioned solidarity from warehousing and delivery Teamsters," Tuesday's resolution warned.

Despite a few campaigns aimed at Amazon facilities, the Teamsters have made little progress in unionizing companies that rely on independent contractors.

The stakes are becoming even higher. Amazon's global workforce shot up by more than 50% last year as the Covid-19 pandemic drove demand for online shopping.

Last year, the company tripled its suburban logistics hubs in Southern California from nine to 32, according to a survey by the Southern California News Group, adding new facilities in such places as Mission Viejo, Palmdale, Playa Vista and Upland, and quadrupling its industrial footprint.

"Amazon is changing the nature of work in our country and touches many core Teamster industries and employers such as UPS, parcel delivery, freight, airline, food distribution, and motion pictures, and presents an existential threat to the standards we have set in these industries," the Teamsters resolution said.