Utah Attorney General Mark Shurtleff said he was prepared to fight the NLRB. “If they want to sue, my attitude is, bring it on, because we think card-check violates federal constitution protections,” he said.

A spokesman for South Carolina Attorney General Alan Wilson also said the state stood by its amendment, which was approved by 86.2% of the state’s voters last November. “South Carolina voters spoke overwhelmingly to ensure that their ballot votes are kept between them and their Maker—not to be influenced by union bosses,” he said.