[JURIST] The 8th Circuit Court of Appeals [official website] has ruled that Wal-Mart [corporate website; JURIST Hot Topic archive] violated labor laws when it disciplined an employee for wearing a union t-shirt and announcing a union meeting to co-workers. In its ruling, issued Monday, the court held that the employee had not violated a company policy against solicitation inside stores. The court did rule that Wal-Mart could discipline the employee for soliciting signatures for a union authorization card in the store. Read the opinion [text, PDF]. Bloomberg has more.