Oscar R. Ewing (March 8, 1889 – January 8, 1980) was a 20th-century American lawyer, social reformer, and politician who was one of the main authors of the Fair Deal program of U.S. President Harry S.

[1][2] In 1942, he became a special U.S. prosecutor who won the conviction of William Dudley Pelley, leader of the Silver Shirts, for sedition.

In 1947, he won the convictions of Douglas Chandler and Robert Best on charges of treason, both of whom had broadcast for the Nazis during World War II.

[1][2] In the Winter of 1946–1947, after the Republicans swept mid-term elections, Ewing began holding quiet meetings at his home in Washington that lead to formulation of Truman's Fair Deal.

As head of FSA until 1952, he promoted civil rights, extended federal welfare programs, and broadened Social Security coverage.

[1] Ewing is credited as the organizer and leader of this unofficial policy group of Truman's, though some other members changed (1947–1952).

They also supported recognition of Israel (1948), Truman's veto of the Taft-Hartley Act (YYYY), and a "welfare state.