The US Chamber of Commerce sued to stop a new Seattle ordinance that could pave the way for independent contractor drivers to unionize. The chamber warned in a court filing that the law could “Balkanize” the market for independent contractor services.

“Absent judicial intervention, the city of Seattle and thousands of other municipalities would be free to adopt their own disparate regulatory regimes, which would Balkanize the market for independent-contractor services and inhibit the free flow of commerce among private service providers around the nation,” the lawsuit claims.

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