The National Labor Relations Board filed suit against the state of Arizona Friday, challenging the legality of a state constitutional amendment that requires workers to hold a secret-ballot election to decide whether to unionize a company.
The agency argues that the state cannot override a federal law that gives workers the option of the so-called card-check method of organizing, in which workers sign cards indicating their interest in forming a union. Labor groups favor the method, while many employers oppose it.
The Arizona suit is the latest in a series of recent NLRB decisions that have sided with unions, which are struggling to remain relevant after years of declining membership and recent attempts by states to curb union bargaining power.
Opponents of the recent decisions say they are evidence that the agency and its board, now dominated by Democrats, are too loosely interpreting federal labor law to award favors to unions at the expense of businesses and states’ rights.