Glossary of Labor Terms

The Taft-Hartley Act (also known as the Labor-Management Relations Act) was passed over then-President Truman's veto in 1947. The act limited employees' ability to unionize by putting additional requirements on them for doing so and forbidding certain kinds of support from other unions. It also forbade unions from contributing to political campaigns and enabled the U.S. Attorney General to prevent strikes if they believed one "imperiled the national health or safety."

Employers and unions are prohibited from making election speeches on company time to massed assemblies of employees within 24 hours before the scheduled time for conducting an election.