"The UAW leader and his fellow unionists also knew the civil-rights movement’s most eloquent leader was on their side. Martin Luther King Jr. frequently spoke to labor audiences and consistently advocated their demands, while pressuring them to make equal opportunity a reality inside as well as outside their ranks. He wanted the U.S. to emulate havens of social democracy like Sweden, whose powerful workers’ movement had helped secure health care for all and an 'equitable division of wealth.'"
Michael Kazin in The New Republic discusses the role of unions in the 1963 March on Washington.
And Harold Meyerson in The American Prospect tells the "story of the radicals behind—and in front of—the demonstration that changed America."