Rev. Delman Coates, senior pastor of Mt. Enon Baptist Church, Clinton, Md., left, Rev. Al Sharpton, president, National Action Network, center, and Rev. Amos Brown, senior pastor of Third Baptist Church, San Francisco, Calif., right, announce their suppor

Rev. Al Sharpton speaks to the crowds at the Sanford police station during a rally for slain Florida teenager Trayvon Martin on Saturday, March 31, 2012 in Sanford, Fla. (AP)