Question: For which foundation is the 47th U.S. Vice President's chief of staff a former president?

Related documents: [0]  [DOC] Bruce Reed (born March 16, 1960) is the former president of the Broad Foundation. Prior to assuming that role in December 2013, he served as Chief of Staff to U.S. Vice President Joe Biden and is a former CEO of the Democratic Leadership Council (DLC). [END] 
[1]  [DOC] Joseph Robinette "Joe" Biden Jr. ( ; born November 20, 1942) is an American politician who was the 47th Vice President of the United States from 2009 to 2017. A member of the Democratic Party, he represented Delaware as a United States Senator from 1973 until becoming Vice President in 2009. [END]  
Answer: Broad Foundation
Broad Foundation