The ads, which began airing last week, are part of an ongoing campaign from a broad coalition of labor and workers' rights advocates working to enact the bill.

The legislation would require companies to recognize and bargain with unions as long as a majority of their labor forces sign cards expressing a desire for union representation.

Opponents of the bill, including the American Meat Institute, say the law would jeopardize a worker's right to privacy and allowed union members to bully employees into voting to organize. 

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