Question: John Edward Sununu (born September 10, 1964) is a former Republican United States Senator from New Hampshire, on November 4, 2008, Sununu lost his re-election bid to which former governor, the senior United States Senator from New Hampshire, since 2009?
Context: Jay Clark Buckey, Jr. (born June 6, 1956, in New York City) is an American physician and astronaut who flew aboard one space shuttle mission (STS-90) as a Payload Specialist.  Buckey briefly ran for the Democratic nomination to challenge New Hampshire Senator John E. Sununu, a first term Republican, when he was up for re-election in 2008.  Buckey withdrew from the race when former Governor Jeanne Shaheen entered the race. John Henry Hoeven III (born March 13, 1957) is an American politician and the senior United States Senator from North Dakota, in office since 2011.  A member of the North Dakota Republican Party, he previously served as the 31st Governor of North Dakota from December 2000 to December 2010.  Hoeven was elected to the U.S. Senate in the November 2, 2010 general election.  He replaced junior Senator Byron L. Dorgan, who chose not to seek re-election.  Hoeven became the senior Senator in 2013 after Kent Conrad retired and was replaced by Heidi Heitkamp, who was once Hoeven's opponent for the Governor's office. Judd Alan Gregg (born February 14, 1947) served as the 76th Governor of New Hampshire and was a United States Senator from New Hampshire, who served as chairman of the Senate Budget Committee.  He is a member of the Republican Party and was a businessman and attorney in Nashua before entering politics.  He currently serves as the Chair of the Public Advisory Board at the New Hampshire Institute of Politics at Saint Anselm College.  Gregg was nominated for Secretary of Commerce in the Cabinet by President Barack Obama, but withdrew his name on February 12, 2009.  He would have been up for re-election in 2010, but chose not to run.  In the November 2010 elections, former State Attorney General Kelly Ayotte, also a Republican, was elected to succeed Gregg in the Senate.  On May 27, 2011, Goldman Sachs announced that Gregg had been named an international advisor to the firm.  In May 2013, Gregg was named the CEO of the Securities Industry and Financial Markets Association, a Wall Street lobbying group.  He later stepped down as CEO in December 2013 and became a senior adviser. John Edward Sununu (born September 10, 1964) is a former Republican United States Senator from New Hampshire.  Sununu was the youngest member of the Senate for his entire six-year term.  He is the son of former New Hampshire Governor and former White House Chief of Staff John H. Sununu.  On November 4, 2008, Sununu lost his re-election bid to former governor Jeanne Shaheen.  His younger brother, Chris Sununu, is Governor of New Hampshire, having won the November 8, 2016 general election. Samuel Bell (February 9, 1770December 23, 1850) was an American politician and lawyer who served as the 14th Governor of New Hampshire from 1819 to 1823, and as the United States Senator for New Hampshire from 1823 to 1835.  Born in Londonderry in the Province of New Hampshire, Bell became a lawyer in the 1790s, and entered politics by becoming a member of the New Hampshire House of Representatives in 1804.  In 1806, the year he left the House, he became the head of a bank which during his tenure in that position became the only New Hampshire bank to fail between 1792 and 1840.  A member of the New Hampshire Senate from 1807 to 1809, and an associate justice of the New Hampshire Supreme Court from 1816 to 1819, Bell was elected to become the Governor of New Hampshire in 1819 as Democratic-Republican.  Re-elected in 1820, 1821, and 1822 against token opposition, Bell's victory in 1822 was accompanied by the largest share of votes cast for a governor candidate of New Hampshire since John Taylor Gilman's victory in 1795.  Whilst Governor, New Hampshire's crime level fell, and industry within the state prospered.  In 1823, declining to stand again for the governorship, he became a Senator for New Hampshire.  He won re-election in 1829, was the chairman of the United States Senate Committee on Claims, and left the Senate in 1835.  He retired from public life thereafter, and died in Chester, New Hampshire at the age of 80.  He is buried in Chester Village Cemetery, Rockingham, New Hampshire. Cynthia Jeanne Shaheen (née Bowers; January 28, 1947) is the senior United States Senator from New Hampshire, since 2009. The 1990 United States Senate election in Iowa was held on November 5, 1990.  Incumbent Democratic United States Senator Tom Harkin sought re-election to a second term in the United States Senate.  Harkin was opposed by Republican United States Congressman Tom Tauke, from Iowa's 2nd congressional district, and both Harkin and Tauke won their primaries uncontested.  Though Harkin performed slightly worse than he had six years earlier, he was successful in his re-election bid and defeated Tauke. Christopher T. Sununu (born November 5, 1974) is an American politician and businessman who is the 82nd and current Governor of New Hampshire, since January 2017.  Sununu was previously a member of the New Hampshire Executive Council, an office he held from 2011-2017.  At age 43 , Sununu is currently the youngest state Governor in the United States. John Henry Sununu (born July 2, 1939) is a Cuban-born American politician who served as the 75th Governor of New Hampshire (1983–89) and later White House Chief of Staff under President George H. W. Bush.  He is the father of John E. Sununu, the former United States Senator from New Hampshire, and Christopher Sununu, the governor of New Hampshire.  Sununu was the chairman of the New Hampshire Republican Party from 2009 to 2011. Jeanie Forrester is Chairman of the Republican Party of New Hampshire and a former Republican member of the New Hampshire Senate, representing the 2nd district from 2010 until 2016.  A businesswoman by trade, Forrester served on the Finance and Public/Municipal Affairs committees.  In 2016, Forrester decided not to seek reelection to the senate and instead ran for the republican nomination for Governor of New Hampshire, ultimately losing to now-Governor Chris Sununu.  Sununu later supported Forrester's successful candidacy for party chairman.
Answer: Cynthia Jeanne Shaheen