A federal appeals on Tuesday court struck down regulations that would require posters about union rights in the workplace. The court said the National Labor Relations Board (NLRB) violated the First Amendment when it mandated that businesses place notices in the workplace and on their company websites informing employees of their rights to unionize. Business that failed to comply would have faced charges of promoting “unfair labor practices.” Industry groups, which quickly challenged the rule after it was issued, cheered the ruling. Jay Timmons, the president and chief executive of the National Association of Manufacturers, pledged to remain vigilant against...