The Service Employees International Union has been organizing protests by and in support of fast food workers. While the protests have focused publicly on the demand for a $15 per hour wage, the real goal of the movement is for the SEIU to unionize fast food workers.

http://illinoisreview.typepad.com/illinoisreview/2014/07/mcdonalds-ruling-by-nlrb-counsel-puts-seius-unionization-goal-within-reach.html