Final answer:
Franklin D. Roosevelt greatly expanded the role of the federal government in the economy during the Great Depression.
Step-by-step explanation:
The president who greatly expanded the role of the federal government in the economy during the Great Depression was Franklin D. Roosevelt.
His New Deal policies aimed to stimulate economic recovery and fight unemployment through government intervention and public works programs. Roosevelt implemented measures such as the creation of the Social Security system, the Works Progress Administration (WPA), and the Tennessee Valley Authority (TVA).
These programs provided relief for the unemployed, supported economic recovery, and promoted the regulation of financial institutions and industries. Overall, Roosevelt's presidency had a significant impact on the expansion of the federal government's role in the economy during the Great Depression.
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