Final answer:
The Populist Party fought for the regulation of railroad rates, an income tax, and an eight-hour workday.
Step-by-step explanation:
The Populist Party, formed in the 1890s, fought for the regulation of railroad rates and an income tax, as well as an eight-hour workday.
They believed that controlling railroad rates and implementing an income tax would help alleviate the economic hardships faced by farmers and the working class. Additionally, they advocated for improved worker conditions and safety measures.