Final answer:
The question confuses different pieces of labor legislation. While the question refers to 1932 legislation, the critical pro-labor legislation was the Wagner Act of 1935 promoted by Senator Robert F. Wagner. The Taft-Hartley Act of 1947, introduced by Congressmen Robert Taft and Fred Hartley, restricted labor rights and was opposed by many labor leaders.
Step-by-step explanation:
The question concerns the Congress legislation in 1932 which aimed at protecting the rights of labor unions. The principal Congressmen who promoted pro-labor laws during this era, specifically those pertaining to the critical National Labor Relations Act of 1935 also known as the Wagner Act, included Senator Robert F. Wagner, who played a pivotal role in advancing labor rights. While your question mentions 1932 legislation, it's essential to clarify that the pivotal Wagner Act which substantially provided workers with the right to organize unions and engage in collective bargaining was passed in 1935. Separate from the Wagner Act is the Taft-Hartley Act of 1947, introduced by Congressmen Robert Taft and Fred Hartley, known for restricting labor rights in response to growing concerns about labor union power.
During the 1930s, Congress passed several pieces of legislation that collectively enhanced labor rights. While not specifically outlined in your question, the 1932 Norris-LaGuardia Act was indeed a vital piece of legislation that prohibited court injunctions in nonviolent labor disputes and marked a significant victory for labor organizations.
It is worth noting that the Taft-Hartley Act, which appears to be conflated in your question with earlier pro-labor legislation, represented a retrenchment of labor's gains rather than promotion, and many labor leaders strongly opposed it. The Act was passed over President Truman's veto in 1947 and had profound implications for the power and activities of labor unions.