Question: When did the senator who vacated a U.S. Senate seat which Thomas M. Davis considering a run for in 2008 serve as Secretary of the Navy?

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. <SEP> Lula Johnson Davis was Secretary for the Majority of the United States Senate from 2008 to 2011.  Davis was born in Louisiana.  She received a B.S. in office administration and an M.Ed., in guidance counseling from Southern University in Baton Rouge, Louisiana.  She began her career with the Senate as a legislative correspondent for Senator Russell B. Long of Louisiana.  After Senator Long retired from the Senate in January 1987, Davis worked as an office assistant for the Democratic Policy Committee’s Senate floor staff office.  In 1993, she became a member of the Democratic floor staff.  In 1995, she was promoted to chief floor assistant.  In 1997, she assumed the position of assistant secretary.  After the retirement of Martin P. Paone, in January 2008, the Senate elected Davis Secretary for the Majority.  As Secretary for the Majority, she was a senior procedural advisor to the Senate Majority Leader, Senator Harry Reid, and supervised the day-to-day Senate schedule.  In so doing, she often worked with Secretary for the Minority David J. Schiappa.  Davis told Senators what they could and could not do when it came to rules and procedure.  Consequently, Davis was called “one of the most powerful unelected people in the U.S. Senate.”  Davis retired at the end of the 111th Congress. <SEP> John William Warner (born February 18, 1927) served as Secretary of the Navy from 1972 to 1974 and as a five-term Republican United States Senator from Virginia from January 2, 1979, to January 3, 2009.  He did not seek reelection in 2008.  He works for the law firm of Hogan Lovells, where he had previously worked before joining the United States Department of Defense. <SEP>  Davis was considering a run for the U.S. Senate seat being vacated by five-term incumbent and fellow Republican John Warner in the 2008 election, but decided against it. Thomas Milburn "Tom" Davis III (born January 5, 1949) is a former Republican member of the United States House of Representatives, representing Virginia's 11th congressional district in Northern Virginia, and currently serves as the Rector and Professor at George Mason University.  He announced on January 30, 2008, that he would not seek reelection to an eighth term.  Davis resigned from Congress on November 24, 2008.