Question: who did Hillary Rodham Clinton run against in her last senate election ?

full_context: Document 1: Hillary Clinton presidential campaign, 2008: The 2008 presidential campaign of Hillary Rodham Clinton, then junior United States Senator from New York, was announced on her website on January 20, 2007. Hillary Clinton was previously the First Lady of the United States and First Lady of Arkansas prior to her election as U.S. Senator from New York. She is also the wife of former President Bill Clinton. Clinton was the source of much media speculation since having expressed interest in being a candidate in the 2008 presidential election since at least October 2002.
Document 2: Clinton family: The Clinton family is a prominent American political family related to Bill Clinton, the 42nd President of the United States (1993–2001), and his wife Hillary Clinton, the 67th United States Secretary of State (2009–13), Senator from New York (2001–09) and the First Lady of the United States (1993–2001). Their immediate family was the First Family of the United States from 1993 to 2001. In 2016, Hillary Clinton became the first female presidential nominee from a major political party in United States history. The Clintons (Bill and Hillary) are the first married couple to each be nominated for president. She was defeated in the election by businessman Donald Trump.
Document 3: United States Senate election in New York, 2000: The United States Senate election in New York in 2000 was held on November 7, 2000. Hillary Rodham Clinton, then First Lady of the United States and the first First Lady to run for political office, defeated Congressman Rick Lazio. The general election coincided with the U.S. presidential election.
Document 4: United States Senate election in New York, 1962: The 1962 United States Senate election in New York was held on November 6, 1962. Incumbent Republican U.S. Senator Jacob Javits won against Democratic challenger James B. Donovan.
Document 5: United States Senate career of Hillary Clinton: 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.
Document 6: Hugh Rodham (born 1950): Hugh Edwin Rodham (born 1950) is an American lawyer and former Democratic Party politician who is the brother of former New York Senator, First Lady, and Secretary of State, Hillary Rodham Clinton, and the brother-in-law of former U.S. President Bill Clinton.
Document 7: United States Senate election in New York, 2006: 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.
Document 8: Kirsten Gillibrand: 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.
Document 9: Huma Abedin: Huma Mahmood Abedin (born July 28, 1976) is an American political staffer who was vice chair of Hillary Clinton's 2016 campaign for President of the United States. Prior to that, Abedin was deputy chief of staff to Clinton, who was U.S. Secretary of State, from 2009 to 2013. She was also the traveling chief of staff and former assistant for Clinton during Clinton's campaign for the Democratic nomination in the 2008 presidential election.
Document 10: Hillaryland: Hillaryland was the self-designated name of a group of core advisors to Hillary Clinton, when she was First Lady of the United States and again when, as United States Senator, she was one of the Democratic Party candidates for President in the 2008 U.S. election.
Document 11: United States Senate election in New Jersey, 2006: The 2006 United States Senate election in New Jersey was held on November 7, 2006. Incumbent Democratic U.S. Senator Bob Menendez was elected to represent New Jersey in the United States Senate for a six-year term which ended in January 2013. The seat was previously held by Democratic Governor of New Jersey Jon Corzine. After he stepped down from his Senate seat and was sworn in Governor, Corzine appointed Rep. Menendez, who was sworn in on January 18, 2006. Menendez was challenged by Republican Thomas Kean, Jr. and seven other candidates. Filing for the primary closed on April 10, 2006. The primary election was held on June 6, 2006. Menendez became the first Hispanic to hold a U.S. Senate seat from New Jersey, and was the first Latino elected to statewide office in the state.
Document 12: United States Senate election in New York, 2004: The 2004 United States Senate election in New York took place on November 2, 2004 along with elections to the United States Senate in other states as well as the presidential election, elections to the United States House of Representatives and various state and local elections. Incumbent Democratic U.S. Senator Chuck Schumer won re-election to a second term with 71.2% of the vote, a then-record margin of victory for any statewide candidate in New York's history. The record was surpassed by Kirsten Gillibrand when she won re-election to a first full term in 2012 with 72% of the vote.
Document 13: Hillary Clinton email controversy: In March 2015, it became publicly known that Hillary Clinton, during her tenure as United States Secretary of State, had used her family's private email server for official communications, rather than official State Department email accounts maintained on federal secure servers. Those official communications included over 100 emails which contained classified information at the time they were sent, as well as nearly 2,100 emails which were not marked classified but would retroactively be ranked as classified by the State Department.
Document 14: Hillary Clinton: Hillary Diane Rodham Clinton ( ; born October 26, 1947) is an American politician who was the First Lady of the United States from 1993 to 2001, U.S. Senator from New York from 2001 to 2009, 67th United States Secretary of State from 2009 to 2013, and the Democratic Party's nominee for President of the United States in the 2016 election.
Document 15: United States Senate election in Tennessee, 2006: The 2006 United States Senate election in Tennessee was held on November 7, 2006. The election winner, Bob Corker, served his term between January 3, 2007 and January 3, 2013. Corker replaced Republican Bill Frist in the Senate, who retired upon the end of his second term in 2007. Corker was the Republican nominee, and the Democratic nominee was Harold Ford, Jr.. The race between Ford and Corker was one of the most competitive Senate races of 2006, with Corker winning the race by less than three percent of the vote. Corker was the only non-incumbent Republican to win a U.S. Senate seat in 2006. Since 1994, the Republican Party has held both of Tennessee's Senate seats.
ground_truth: John Spencer