Question: What politician from New York served two terms representing New York in the United States Senate? 

Context articles: United States Senate career of Hillary Clinton
William Cooper (judge)
United States Senate election in New York, 2006
Jerry Janezich
Kirsten Gillibrand
Harold G. Hoffman
Jacob Ruppert
George A. Halsey
Porter Hall (Centerville, Iowa)
Thomas Marshall (Maine politician)

Hillary Rodham Clinton served as a United States Senator from New York from January 3, 2001 to January 21, 2009.
 She won the United States Senate election in New York, 2000 and the United States Senate election in New York, 2006.
 Clinton resigned from the Senate on January 21, 2009 to become United States Secretary of State for the Obama Administration.
William Cooper (December 2, 1754 – December 22, 1809) was an American merchant, land speculator and developer, the founder of Cooperstown, New York.
 A politician, he was appointed as a county judge and later served two terms in the United States Congress, representing Otsego County and central New York.
 He was the father of James Fenimore Cooper, who became a noted writer of historical novels related to the New York frontier.
The 2006 United States Senate election in New York was held November 7, 2006.
 Incumbent Democratic U.S. Senator Hillary Rodham Clinton won, by a more than two-to-one margin, a second term representing New York in the United States Senate.
 Clinton was challenged by Republican John Spencer, a former Mayor of Yonkers, New York.
 Spencer won his party nomination by defeating former national security staffer K. T. McFarland in a primary.
Jerry Janezich (born March 16, 1950) is a Minnesota politician, a former member of the Minnesota legislature, and a former candidate for the United States Senate.
 Janezich served two terms in the Minnesota House of Representatives, and two terms in the Minnesota Senate.
Kirsten Elizabeth Gillibrand (née Rutnik; ; born December 9, 1966) is an American attorney and politician who since 2009, has served as the junior United States Senator from New York, alongside the Democratic Leader of the United States Senate, Chuck Schumer.
 Before the Senate, she served for two years (2007-09) in the United States House of Representatives, representing New York's 20th congressional district.
 She is a member of the Democratic Party.
Harold Giles Hoffman (February 7, 1896 – June 4, 1954) was an American politician, a Republican who served as the 41st Governor of New Jersey, from 1935 to 1938.
 He also served two terms representing  's 3 congressional district in the United States House of Representatives, from 1927 to 1931.
Jacob (Jake) Ruppert Jr. (August 5, 1867 – January 13, 1939) was an American brewer, businessman, National Guard colonel and United States Congressman who served for four terms representing New York from 1899 to 1907.
 He also owned the New York Yankees of Major League Baseball from 1915 until his death in 1939.
George Armstrong Halsey (December 7, 1827 – April 1, 1894) was an American Republican Party politician and leather manufacturer from New Jersey, who served two non-consecutive terms representing  's 5 congressional district .
Porter Hall is a historic residence located in Centerville, Iowa, United States.
 The 2½-story frame house exhibits aspects of the Picturesque Tudor Revival style, especially in the half-timbering and stucco.
 The house gained its present appearance during the ownership of Dr. Charles James in the 1910s and 1920s.
 There is some question as to whether this is an older 1880s house that has been extensively remodeled.
 It receives its name from Claude R. Porter who owned this property from 1906 to 1909.
 Porter was a Democrat, who served two terms in the Iowa House of Representatives, two terms in the Iowa Senate, United States Attorney for the Southern District of Iowa, and a member of the Interstate Commerce Commission.
 He was also a perennial candidate for Governor of Iowa and the U.S. Senate from Iowa, but lost every election to his Republican opponent.
 The house was listed on the National Register of Historic Places in 1980.
Thomas H. Marshall (1826-1861) was an American politician and military commander from Maine.
 Marshall, a resident of Belfast, Maine and graduate of Bowdoin College, served two terms in the Maine House of Representatives (1857-1858) and two terms in the Maine Senate (1859-1860).
 During his final term in the Maine Senate, Marshall was elected Senate President.
 With the outbreak of the American Civil War, Marshall left elected office and became a major in the 4th Maine Volunteer Infantry Regiment, which assembled in Rockland, Maine in May 1861.
 Marshall was later transferred to the 7th Maine Volunteer Infantry Regiment, where he was at first a lieutenant colonel and later the commanding officer.
 He became ill with a fever and died in Baltimore along with 80 others in the 7th Maine Regiment.