According to the United States Constitutional amendment, the populist policies that were eventually successful are:
Direct election of senators: this is evident after Article 1 Section 3 of the 17th amendment to the Constitution, which stated that the election of the Senate shall be made by the people thereof.
Creation of a federal income tax: this is evident in the 16th Amendment which allows Congress to levy an income tax on the citizens.
However, the populist policies that were not successful eventually are:
16-to-1 silver-to-gold currency ratio: this is evident in the fact that such policies were never discussed at the Congress, but only remain a debate among the Populist party.
Government control of railroads: this is evident with the Interstate Commerce Act of 1887, which regulated the practice of railroads but did not fix the price. The act led to the formation of the Interstate Commerce Commission to monitor the affairs of railroad transportation practice.
Hence, in this case, it is concluded that there are some Populist party's successful policies, while some others were not.
