Strengthening Labor Rights in the New Deal

As the United States faced the Great Depression in the 1930s, President Franklin D. Roosevelt's New Deal implemented numerous programs aimed at economic recovery and social reform. One of the notable aspects of the New Deal was its focus on labor rights and the relationship between the federal government and labor unions. This context raises questions about how various policies shaped labor movements during this period.

Which of the following New Deal initiatives is primarily credited with strengthening the rights of labor unions and enabling them to organize and bargain collectively?