Industrial expansion and population growth radically changed the face of the nation's cities. Noise, traffic jams, slums, air pollution, and sanitation and health problems became commonplace. Mass transit, in the form of trolleys, cable cars, and subways, was built, and skyscrapers began to dominate city skylines.
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The answer would be Shrinking Population
President Roosevelt tried to pack the court by attempting to add 15 more judges. However, it did not pass. He believed that he needed to add more judges to support his policies. He wanted new judges who were open to change and accept the economic policies that needed to be implemented.