According to Wikipedia,
William Hutcheson was the leader of the United Brotherhood of Carpenters and Joiners of America from 1915 until 1952. A conservative craft unionist, he opposed the organization of workers in mass production industries such as steel and automobile manufacturing into industrial unions. Under his administration the Carpenters Union grew by taking an aggressive stance toward other trade unions that claimed work that Carpenters also claimed. He took his union out of the American Federation of Labor's Building Trades Department on several occasions when he was displeased by its ruling on jurisdictional disputes involving the Carpenters.