California Congressman Fortney "Pete" Stark was caught on tape in June insulting a constituent at a town hall meeting. When the voter identified himself as a member of the Minutemen, Representative Stark asked him, "Who are you gonna kill today?" The taped exchange has gone viral. I watched Mr. Stark with fascination and a bit of nausea, incredulous that he's been representing his district since 1979. Reading his words is disturbing, but watching the video is astonishing. A few minutes into it, I discovered that I know Pete Stark. In fact, every single one of us knows Pete Stark. Congressman...