
(AFL-CIO) 815 16th St., N.W. Washington, D.C. 20006 Membership AFL-CIO is an umbrella union federation that represents 57 unions and over 12,000,000 members. Union membership in the Federation is voluntary and the AFL-CIO exercises little authority over its constituent unions. Important Relationships Alliances: National Day Laborer Organizing Network (developing alliance) National Domestic Workers Alliance (developing alliance) National Guestworker Alliance (developing alliance) United...