During the mid-to-late 1950s, the labor movement was under intense Congressional scrutiny for corruption, racketeering, and other misconduct. Enacted in 1959 after revelations of corruption and undemocratic practices in the International Brotherhood of Teamsters, International Longshoremen's Association, United Mine Workers and other unions received widespread attention, the Act requires unions to hold secret elections for local union offices on a regular basis and provides for review by the United States Department of Labor of union members' claims of improper election activity. Organized labor opposed the act because it strengthened the Taft-Hartley Act of 1947.