He said 35 workers, including key union supporters, were laid off, without any decline in work.
They demanded to know if the citizen was a union supporter.
Republicans recently dropped a similar bill under pressures from Democrats and other union supporters.
Union supporters often lost their jobs and found themselves blacklisted throughout the industry.
Last year, the restaurant laid off several union supporters.
This action was seen as a betrayal by Steunenberg's union supporters.
Such elections frequently turn into months of battles between management and labor, with union supporters often being fired.
Through it all, union supporters tried to cast Yale as a national example of corporate greed.
Minutes later, the police arrested 31 union supporters, charging them with trespassing.
Federal labor law bars managers from retaliating against union supporters.