The names in the American pantheon of black civil rights leaders is long. It stretches from Crispus Attucks, a slave of black and American Indian parents who was killed in the 1770 Boston Massacre by British soldiers, to Andrew Young Jr., a 1960s civil rights leader and later Atlanta mayor. Now there's an effort to add a new name to the list: Minutemen. The lawn-chair brigade, which appointed itself border guardians last year, has now taken it upon itself to become guardians of black America. The Minutemen, lead by cofounder and failed congressional candidate Jim Gilchrist of California, launched a...