Question: Nicola Dickson "Niki" Sauvage Tsongas is an American politician whose husband lost the 1992 Democratic presidential primary to who?
Context: Paul Efthemios Tsongas ( ; February 14, 1941January 18, 1997) was an American politician.  He represented Massachusetts in both houses of United States Congress, holding office from 1975 to 1985.  He won seven states as a candidate in the 1992 Democratic presidential primaries, losing the nomination to Bill Clinton. The 1992 Democratic presidential primaries were the selection process by which voters of the Democratic Party chose its nominee for President of the United States in the 1992 U.S. presidential election.  Arkansas Governor Bill Clinton was selected as the nominee through a series of primary elections and caucuses culminating in the 1992 Democratic National Convention held from July 13 to July 16, 1992, in New York City. The 2016 California Democratic presidential primary was held on June 7 in the U.S. state of California as one of the Democratic Party's primaries ahead of the 2016 presidential election. The District of Columbia Democratic Presidential Primary took place on February 12, 2008, nicknamed the "Potomac Primary" because Maryland and Virginia, which border the Potomac River, also held Democratic primaries that day.  Fifteen delegates were up for grabs in the District of Columbia Democratic Primary, including 10 delegates from the District of Columbia's municipal subdivisions (five delegates for Wards 1-4, and five delegates for Wards 5-8).  An additional five delegates were awarded to the at-large winner, Barack Obama.  These 15 delegates represented the District of Columbia at the Democratic National Convention in Denver, Colorado.  A total of 24 unpledged delegates, known as superdelegates, also attended the convention and cast their votes as well. The Nevada Democratic Presidential Caucuses took place on January 19, 2008 after having been moved from a later date by the Nevada Democratic Party.  The Nevada Democratic Caucus was considered important in determining the eventual party nominee, as many described it as the "Bellwether of the West" seeing as how it is the first Western state to vote in the Democratic Presidential Primary season. The Montana Democratic Presidential Primary took place on June 3, 2008, with 16 delegates at stake.  Along with South Dakota, it was one of the last two elections in the 2008 Democratic Party Presidential Primary.  The winner in Montana's at-large congressional district was awarded all of that district's delegates, which totaled 10 (the district was split into Western and Eastern halves).  Another six delegates were awarded to the statewide winner, Barack Obama.  The 16 delegates represented Montana at the Democratic National Convention in Denver, Colorado.  Eight other unpledged delegates, known as superdelegates, also attended the convention. The Maryland Democratic Presidential Primary took place on February 12, 2008.  Nicknamed the "Potomac Primary" or the "Chesapeake Primary" because the District of Columbia and Virginia also held their primaries that day (and all three border the Potomac River), a total of 70 delegates were up for grabs in Maryland.  The winner in each of Maryland's eight congressional districts was awarded all of that district's delegates, totaling 46.  Another 24 delegates were awarded to the statewide winner, Barack Obama.  The 70 delegates represented Maryland at the Democratic National Convention in Denver, Colorado.  Twenty-nine other unpledged delegates, known as superdelegates, also attended the convention and cast their votes as well. Nicola Dickson "Niki" Sauvage Tsongas ( ; born April 26, 1946) is an American politician and the current U.S. Representative for Massachusetts 's 3 congressional district .  From 2007 to 2013 she represented Massachusetts 's 5 congressional district , the district her husband Paul Tsongas served prior to being elected to the United States Senate.  She is a member of the Democratic Party.  Following John Kerry's appointment as Secretary of State, she was widely expected to run in the 2013 special election for the Senate seat once held by her husband; she put such speculations to rest when she announced her endorsement of Representative Ed Markey instead. The 1980 Democratic presidential primaries were the selection process by which voters of the Democratic Party chose its nominee for President of the United States in the 1980 U.S. presidential election.  Incumbent President Jimmy Carter was again selected as the nominee through a series of primary elections and caucuses culminating in the 1980 Democratic National Convention held from August 11 to August 14, 1980, in New York City.  It is notable for being the last time that an incumbent president lost a state's presidential primary. The American Leadership Project (ALP) is an unincorporated association organized under section 527 of the IRS code formed in February 2008 in order to highlight issues of importance to the American middle class, such the economy, jobs, the rising cost of health care, and the mortgage crisis.  The ALP intended to communicate issue-specific messages during the 2008 Democratic presidential primary elections and presently for the general election.  The ALP does not coordinate with any candidate or any candidate’s committee.  The ALP's messages were used preceding primary elections in the states of Texas, Ohio, Pennsylvania, and Indiana.  The ads had been pro-Hillary Clinton and anti-Barack Obama.  Since the conclusion of the Primary season, with Barack Obama as the Democratic nominee and John McCain as the Republican candidate, the organization has run several ads against McCain.
Answer: Bill Clinton