I went to a demonstration this afternoon in Kennett Square, Pennsylvania, sponsored by the Farmworkers Support Committee (CATA) based in South Jersey and the Kaolin Workers Union in Kennett Square. This part of rural (but increasingly exurban) southeast PA is a mushroom-growing area; it supplies 40 percent (!) of the United States' mushrooms. CATA and the Kaolin union are both fantastic worker- and immigrant-led organizations that, beginning with the Kaolin Strike in 1993 and culminating in successful unionization in 2002, have kept up the pressure both for workers' rights and migrant laborer and immigrant rights.