The National Labor Relations Board (NLRB) was a barely-noticed federal agency until recently. Now, it's mentioned in Republican presidential debates and is the object of heated political attacks. Why? The NLRB is in the political crosshairs of many on the right because it enforces workers' rights, and has for more than 75 years. These rights have been under assault in state legislatures, by governors, and now the right has turned its sights on the NLRB.