The New Deal policy was introduced in the United States during the presidency of:

This question pertains to a significant period in United States history, specifically the Great Depression. The correct answer is Franklin Roosevelt.

• The New Deal was a series of programs, public work projects, financial reforms, and regulations enacted in the United States during the 1930s. It was a response to the Great Depression and was spearheaded by President Franklin D. Roosevelt, who served from 1933 to 1945.
• Jimmy Carter (1977-1981), Harry Truman (1945-1953), and Richard Nixon (1969-1974) were all presidents much later than the Great Depression era. Their presidencies dealt with different national and international challenges, not the initial implementation of the New Deal.