President Joe Biden on Sunday offered his support for organizing efforts by Amazon workers in Alabama, though he stopped just short of endorsing the formation of a union.

“Workers in Alabama — and all across America — are voting on whether to organize a union in their workplace. It’s a vitally important choice — one that should be made without intimidation or threats by employers,” the president tweeted. “Every worker should have a free and fair choice to join a union.”

His tweet was accompanied by a video in which Biden addressed the workers involved. He told them that the choice whether to organize was their choice exclusively, and that there should be “no coercion” by the company.

“I have long said America wasn’t built by Wall Street,” the president began. “It was built by the middle class, and unions built the middle class.”

Biden has long cultivated an image as a friend of organized labor but had previously largely steered clear of the efforts to organize Amazon’s workers at a location in Bessemer, Ala. Some 6,000 workers at the Alabama facility have been voting whether to organize.

“If we don’t have the leader of the free world speaking up and saying, ‘I’ve got these workers’ backs, so that they can actually freely choose their union,’ … We’re leaving them stranded,” Sara Nelson, president of the Association of Flight Attendants-CWA told POLITICO in an interview.

This blog originally appeared at Politico on February 28, 2021. Reprinted with permission.

About the Author: David Cohen is Senior Editor at Politico. He joined POLITICO in 2010 after 25 years in the news business, including extended stints at The Philadelphia Inquirer, Nando.net (now McClatchy Interactive) and The Record of Hackensack (N.J.). He is also the author of “Rugged and Enduring: The Eagles, The Browns and 5 Years of Football,” published in 2001.