Most national unions in the United States are linked with the American Federation of Labor and Congress of Industrial Organizations (AFL-CIO) , an association that pursues improving the shared interests of its member unions at the national level.
Explanation:
The U.S. Trade and Industrial Workers Congress is the largest industrial organisation in the US. This consists of 55 national and international syndicates, bringing together more than 12 million active and retired employees.
The AFL-CIO is an international labour union federation. AFL–CIO has little control over the activities of its affiliate organisations as a mutual union except in extremely limited situations (e.g. the right to displace a member Union in the pursuit of corruption[8] and to impose conflicts over power or organisation). The AFL–CIO included 56 affiliate unions with 12.5 million workers in June 2014.
