Question 1: How did the American two-party political system respond to the consequences of rapid economic and social change in the United States

Question 1: How did the American two-party political system respond to the consequences of rapid economic and social change in the United States during "The Era of the Weak State" (1877-1900)?

Question 2: The Progressive Movement ended the "Era of the Weak State." But what was progressivism? How did it change politics and governance in the United States between 1900 and 1916?