Terry Halvorsen is a retired American military officer who is a former Chief Information Officer at the US Department of Defense.
 He previously served as the Acting Department of Defense Chief Information Officer and the Department of the Navy Chief Information Officer.
William Lee Shelton (born February 25, 1954) is a former United States Air Force four-star general who last served as the commander of Air Force Space Command from January 5, 2011 to August 15, 2014.
 He had been the Assistant Vice Chief of Staff of the United States Air Force and Air Staff Director.
 He had served as Chief of Warfighting Integration and Chief Information Officer, Office of the Secretary of the Air Force.
 Shelton held numerous positions of leadership throughout the United States Air Force.
 He retired from the Air Force on September 1, 2014.
Samuel Anthony "Sam" Nixon, Jr. (born November 9, 1958) is an American politician.
 He served in the Virginia House of Delegates from March 1994 to April 2010, representing the 27th district in Chesterfield County, the southern suburbs of Richmond.
 From 2010 until 2015, he was the Chief Information Officer of the state, and head of the Virginia Information Technologies Agency (VITA).
Priscilla Guthrie joined the Office of the Director of National Intelligence (ODNI) as the Intelligence Community (IC) Chief Information Officer on May 26, 2009.
 She was previously Director of the Information Technology and Systems Division of the Institute for Defense Analyses, a non-profit corporation that administers three federally funded research and development centers to provide objective analyses of national security issues.
 From 2001 to 2006, she served as Deputy Assistant Secretary of Defense (Deputy Chief Information Officer) at the Department of Defense, where she was responsible for information support to deployed forces.
 Prior to her position at the Pentagon, Ms. Guthrie was a Vice President of TRW Inc., where she established and led a small, global unit responsible for driving new IT technology into the company's business.
 She also served in several other positions at TRW, Inc. during her career.
 Ms. Guthrie holds a B.S. from Pennsylvania State University and an M.B.A. from Marymount College.
Philip Fasano is an executive vice president and the chief information officer at American International Group (AIG).
 Formerly he served as executive vice president and chief information officer at Kaiser Permanente.
 He graduated with a BS degree in computer science from New York Institute of Technology.
Karen S. Evans was the Administrator of the Office of Electronic Government and Information Technology (IT) at the Office of Management and Budget.
 Evans retired after a long career in the government from this office on January 20, 2009.
 Evans served as the "de facto" chief information officer for the United States until the office was created by Barack Obama who appointed Vivek Kundra.
Ron Miller (born August 11, 1959) is an American politician and businessman from the U.S. state of Maryland.
 He lives in Huntingtown, Maryland, and is the communications director for the Calvert County Republican Central Committee.
 He served in the United States Air Force from 1983–1992, attaining the rank of Captain.
 He also worked for the Bush administration from 2001 to 2004, serving the United States Government as a chief information officer (CIO) with the Federal Emergency Management Agency (FEMA), and later as a Program Executive Office for the Small Business Administration (SBA).
 He also has worked for private sector companies, including Science Applications International Corporation and PricewaterhouseCoopers.
The United States government's Information Sharing and Customer Outreach office or ISCO was one of five directorates within the office of the Chief Information Officer (CIO) under the Office of the Director of National Intelligence (ODNI).
 ISCO changed its name and function to Information Technology Policy, Plans, and Requirements (ITPR) in July 2007.
 Established by at least February 2006, ISCO is led by the Deputy Associate Director of National Intelligence for Information Sharing and Customer Outreach, which is currently Mr. Richard A. Russell.
 ISCO's information sharing and customer outreach responsibilities extend beyond the United States Intelligence Community and cross the entire U.S. government.
Barack Hussein Obama II ( ; born August 4, 1961) is an American politician who served as the 44th President of the United States from 2009 to 2017.
 He is the first African American to have served as president.
 He previously served in the U.S. Senate representing Illinois from 2005 to 2008 and in the Illinois State Senate from 1997 to 2004.
Carole Post is the Deputy Chief Operating Officer of USF Health at the University of South Florida.
 She was formerly the Executive Vice President at New York Law School and serves as the school's Chief Operating Officer and first Chief Strategy Officer.
 Before her tenure at New York Law School, she served as the Commissioner of the New York City Department of Information Technology and Telecommunications (DoITT) and New York City's Chief Information Officer (CIO).
 She was appointed by Mayor Michael R. Bloomberg on December 30, 2009 and assumed the official position on January 19, 2010.
 She is the first woman to have held this office at the City of New York.
 Post modernized New York City government practices and infrastructure to advance open government and improve services to the public.

Question:  Karen S. Evans served as the "de facto" chief information officer for the United States until the office was created by an American politician who served in the U.S. Senate representing what state?
Answer: Illinois