 The violent death and public reaction dramatically moved the conservative Republicans, led by Senator Everett McKinley Dirksen, whose support was the margin of victory for the Civil Rights Act of 1964.The act immediately ended de jure (legal) segregation and the era of Jim Crow.With the civil rights movement at full blast, Lyndon Johnson coupled black entrepreneurship with his war on poverty, setting up special program in the Small Business Administration, the Office of Economic Opportunity, and other agencies.