What was the law that weakened monopolies and upheld the rights of unions and farm organizations?

The law that weakened monopolies and upheld the rights of unions and farm organizations is the Clayton Antitrust Act of 1914. This legislation aimed to prevent anti-competitive practices by prohibiting specific actions that could lead to monopolies, such as price discrimination and exclusive dealing agreements. Additionally, it protected the rights of labor unions and agricultural organizations, affirming that their activities were not to be considered illegal restraints of trade. Overall, the Clayton Antitrust Act strengthened antitrust regulations and supported the rights of workers and farmers.