Anderson was an important figure in the struggle for African-American artists to overcome racial prejudice in the United States during the mid-twentieth century. In 1939 during the era of racial segregation, the Daughters of the American Revolution (DAR) refused to allow Anderson to sing to an integrated audience in Constitution Hall in Washington, D.C. The incident placed Anderson in the spotlight of the international community on a level unusual for a classical musician. With the aid of First Lady Eleanor Roosevelt and her husband President Franklin D. Roosevelt, Anderson performed a critically acclaimed open-air concert on Easter Sunday, April 9, 1939, on the Lincoln Memorial steps in the capital. She sang before an integrated crowd of more than 75,000 people and a radio audience in the millions.