Question: When was the president born that Ed Callahan served under as Chairman of the NCUA?

Context paragraphs:
Ronald Reagan: Ronald Wilson Reagan ( ; February 6, 1911 – June 5, 2004) was an American statesman and actor who served as the 40th President of the United States from 1981 to 1989.  Before his presidency, he was the 33rd Governor of California, from 1967 to 1975, after a career as a Hollywood actor and union leader.

Asif Ali Zardari: Asif Ali Zardari (Urdu: ‎ ; Sindhi: ‎ ; born 26 July 1955) is a Pakistani politician and the former co-chairperson of Pakistan People's Party.  He served as the 11th President of Pakistan from 2008 to 2013, the first president born after Partition.

Debbie Matz: Debbie Matz served as the eighth board chairman of the National Credit Union Administration (NCUA).  She was appointed by U.S. President Barack Obama.  NCUA is an independent federal agency that oversees the United States’ credit union industry, which has more than $1.2 trillion in assets.  NCUA supervises federal credit unions and operates the National Credit Union Share Insurance Fund (NCUSIF) that protects deposits up to $250,000 of nearly 105 million account holders in all federal credit unions and the overwhelming majority of state-chartered credit unions.

John Estey: John H. Estey is an attorney who served as chief of staff to Pennsylvania Governor Ed Rendell from 2003 until 2007.  He served as interim president of the Milton Hershey School for the 2013–2014 school year and currently serves as executive vice president – administration at Hershey Trust Company, in Hershey, Pennsylvania.  Before joining Hershey Trust Company, Estey was a partner at Ballard Spahr LLP in Philadelphia, where he was a co-chair of the Government Relations and Regulatory Affairs Group.  He has served as the chairman of the board of commissioners of the Delaware River Port Authority and as chairman of the board of directors of the Philadelphia Regional Port Authority He serves as chairman of board of directors of the Independence Visitor Center in Philadelphia, and is a member of the boards of directors of the Gettysburg Foundation and the Greater Philadelphia Tourism Marketing Corporation.

Frederic Adrian Delano: Frederic Adrian Delano II (September 10, 1863 – March 28, 1953) was an American railroad president born in Manhattan, New York.  He was a member of the Delano family as a son of Warren Delano Jr. and Catherine Robbins Lyman, brother of Sara Ann Delano, and uncle of U.S. President Franklin Delano Roosevelt.  His philanthropic work through the Commercial Club of Chicago strongly impacted his nephew's Presidential policies.  Delano was Chairman of the Committee on the Regional Plan for New York and Its Environs, which released the regional plan for New York on May 27, 1929.  He was also a prime organizer of the "Regional Plan for New York and Its Environs," published in 1928.  He was also a member of the Commercial Club of Chicago which affected the development of Chicago in the 19th and 20th centuries.  Delano was the first vice-chairman of the Federal Reserve and the National Resources Planning Board.

Joe Andrew: Joseph J. Andrew (born March 1, 1960) is an American politician and lawyer.  He was national chairman of the Democratic National Committee (DNC) from 1999 to 2001.  He served with DNC General Chairman Ed Rendell.  Asked to serve by President Bill Clinton, Andrew became, at the age of 39, one of the youngest chairpersons in the history of the DNC.  He later served as chairman of the New Democratic Network, and in 2006 helped to found The Blue Fund, a mutual fund which invests in companies that contribute to Democratic campaigns.  He now serves as the global chairman of Dentons, the world's largest law firm.

Rick Metsger: Richard Thomas "Rick" Metsger (born August 16, 1951) is a Democratic politician who served in the Oregon State Senate from 1999 to 2011.  President Barack Obama nominated Rick Metsger to serve on the Board of the National Credit Union Administration on May 16, 2013.  The U.S. Senate confirmed Mr. Metsger on August 1, 2013, and he took the oath of office on August 23, 2013.  He served as the ninth NCUA Board Chairman from May 1, 2016, through January 22, 2017.

Ed Callahan: Edgar F. Callahan (March 23, 1929 – March 18, 2009) was an American civil servant, who served as Chairman of the National Credit Union Administration (NCUA) under President Ronald Reagan from 1981 to 1985.

Willard Gaylin: Willard Gaylin is Clinical Professor of Psychiatry at Columbia College of Physicians and Surgeons.  He is co-founder, along with Daniel Callahan, of The Hastings Center, and was its president since its inception in 1969 to 1993, chairman through 1994, and is now a member of the board.  Gaylin received his B.A. from Harvard College, his M.D. from CaseWestern Medical School, and a Certificate in Psychoanalytic Education from the Columbia University Center for Psychoanalytic Training and Research.  For some 30 years he served on its faculty as a training and supervising psychoanalyst.  At one time he simultaneously served as Professor of Psychiatry at Columbia Medical School, Professor of Psychiatry and Law at Columbia Law School and Adjunct Professor at Union Theological Seminary.

James Buchanan: James Buchanan Jr. ( ; April 23, 1791June 1, 1868) was the 15th President of the United States (1857–61), serving immediately prior to the American Civil War.  He is the only president from Pennsylvania, the only president to remain a lifelong bachelor, and the last president born in the 18th century.  A member of the Democratic Party, he was the 17th United States Secretary of State and served in the United States Senate and United States House of Representatives.

Supporting paragraphs: Ed Callahan Ronald Reagan
Answer: February 6, 1911