The AFL-CIO recently joined with other investors to ask corporations to nominate more women as directors. The AFL-CIO’s Secretary-Treasurer Elizabeth Shuler co-signed a letter with state officials from California, New York, Washington, Massachusetts and other states, as well as executives from the nation’s largest state pension funds, mutual fund companies, and women’s organizations.

Investors sent the letter to the nominating committees of S&P 500 companies that do not have any women on their boards.

The U.S. Supreme Court today ruled 5-4 that as many as 1.6 million women who are current or former Wal-Mart employees cannot sue Wal-Mart for pay discrimination in a class-action suit. A lower court had ruled that the women could join together in a class action.