Mary Margaret Truman Daniel (February 17, 1924 – January 29, 2008) was an American classical soprano, actress, journalist, radio and television personality, writer, and New York socialite.

[1] After graduating from George Washington University in 1946, she embarked on a career as a coloratura soprano, beginning with a concert appearance with the Detroit Symphony Orchestra in 1947.

[4] In June 1944, she christened the battleship USS Missouri at Brooklyn Navy Yard, and spoke again in 1986 at the ship's recommissioning.

When Truman was 16 years old, she began taking voice lessons in Independence from Mrs. Thomas J. Strickler, a family friend.

She sang professionally for the next decade, appearing with major American orchestras and giving several national concert tours.

[2] This practice was broken in 1950 when Washington Post music critic Paul Hume wrote that Truman was "extremely attractive on the stage... [but] cannot sing very well.

However, Hume showed the letter to a number of his colleagues, including Milton Berliner, music critic of the rival Washington Times Herald, which published a story.

The Post was then forced to acknowledge the letter, which drew international headlines, becoming a minor scandal for the Truman administration.

[12][13] She became part of the team of NBC Radio's Weekday show that premiered in 1955, shortly after its Monitor program made its debut.

She also wrote a personal biography of her mother and histories of the White House and its inhabitants (including first ladies and pets).

From 1980 to 2011, 25 books in the Capital Crimes series of murder mysteries, most set in and around Washington, D.C., were published under Margaret Truman's name.

"[17] In 2000, another ghostwriter, William Harrington, had claimed in a self-written obituary before his apparent suicide that Margaret Truman and others were his clients.

[19] On April 21, 1956, Truman married Clifton Daniel, a reporter for The New York Times and later its managing editor, at Trinity Episcopal Church in Independence; he died in 2000.