UPDATE: I finally found the video of James Harris:

Yesterday, John McCain and Sarah Palin visited Waukesha, Wisconsin, and the visit made national news because of a few particular (angry, passionate) McCain supporters in the crowd – including local blogger and talk show host, James T. Harris.
At a rally in Waukesha, Wis., on Thursday, James T. Harris, a radio host in Milwaukee who is African American, took the microphone and professed his full support for Sen. McCain’s candidacy. He urged him to talk more about the “shady characters” — naming …