The union mentioned here is of course the Teamster union. This is a lot of legal talk but a good read and no doubt a big deal.

Trucking groups are pressing forward with efforts to thwart the California Supreme Court ruling that upended years of law used to decide if a worker is an employee or an independent contractor.

Independent contractors make up a large part of the transportation industry workforce, including thousands of truck driver owner-operators in California.
Earlier this month, a federal judge in California heard arguments from both sides on the motion, including from a union that it allowed to intervene in the case on the state’s side.
An attorney for the union said it was too early to consider a U.S. Supreme Court showdown. Previous decisions in the Ninth Circuit have determined that state laws were not pre-empted by federal regulations under similar situations, said Andrew Kushner.