I highly recommend this speech to the United Steelworkers by Rich Trumka, Secretary Treasurer of the AFL-CIO and former President of the United Mine Workers, addressing the issue of racism among working class people as an issue in the campaign. It's a real cri de coeur (a phrase I try to avoid around mine workers) against both racism and silence in its face. When you watch something like this, you realize why the idea of strong unions terrifies the Republican Party.
I was also struck by several references to creating clean energy jobs -- pretty cool coming from a UMW member.