St. Louis -- White-supremacist groups around the country are moving aggressively to recruit new members by promoting their violent, racist ideologies on billboards, in radio commercials and in leaflets tossed on suburban driveways. Watching with mounting alarm, civil rights monitors say these tactics stake out a much bolder, more public role for many hate groups, which are trying to shed their image as shadowy extremists and claim more mainstream support. Watchdog groups fear increased violence from these organizations as they grow. But perhaps an even greater fear is that the new public relations strategy will let neo-Nazis recast themselves as...