Closed shop in the context of "Union shop"

Robert Alphonso Taft Sr. (September 8, 1889 – July 31, 1953) was an American politician, lawyer, and scion of the Republican Party's Taft family. Taft represented Ohio in the United States Senate, briefly served as Senate majority leader, and was a leader of the conservative coalition of Republicans and conservative Democrats who blocked expansion of the New Deal. Often referred to as "Mr. Republican", he co-sponsored the Taft–Hartley Act of 1947, which banned closed shops, created the concept of right-to-work states, and regulated other labor practices.

The elder son of William Howard Taft, the 27th president of the United States and 10th chief justice of the United States, Robert Taft was born in Cincinnati, Ohio. He pursued a legal career in Cincinnati after graduating from Harvard Law School in 1913. With his brother Charles Phelps Taft II, he co-founded the law partnership of Taft Stettinius & Hollister. Taft served in the Ohio House of Representatives from 1921 to 1931 and in the Ohio Senate from 1931 to 1933. Though he lost re-election in 1932, he remained a powerful force in state and local politics.

In the context of labor law in the United States, the term right-to-work laws refers to state laws that prohibit union security agreements between employers and labor unions. Such agreements can be incorporated into union contracts to require employees who are not union members to contribute to the costs of union representation. Unlike the right to work definition as a human right in international law, U.S. right-to-work laws do not aim to provide a general guarantee of employment to people seeking work but rather guarantee an employee's right to refrain from being a member of a labor union.

The 1947 federal Taft–Hartley Act governing private sector employment prohibits the "closed shop" in which employees are required to be members of a union as a condition of employment, but allows the union shop or "agency shop" in which employees pay a fee for the cost of representation without joining the union. Individual U.S. states set their own policies for state and local government employees (i.e. public sector employees). Twenty-eight states have right-to-work policies (either by statutes or by constitutional provision). In 2018, the U.S. Supreme Court ruled that agency shop arrangements for public sector employees were unconstitutional in the case Janus v. AFSCME.