Question: Which Republican representative considered running for US Senate after fellow Republican John Warner vacated in 2009?

Context paragraphs:
United States Senate election in Virginia, 1978: The 1978 United States Senate election in Virginia was held on November 7, 1978.  Former Secretary of the Navy Republican John Warner beat Attorney General of Virginia Andrew P. Miller.

David L. Williams (politician): David Lewis Williams (born May 28, 1953) is an American attorney, Republican politician, and judge from the U.S. state of Kentucky.  From 1987 to 2012, Williams represented Senate District 16, a position he secured upon the retirement of fellow Republican Doug Moseley.  When Republicans gained control of the state senate in 2000, Williams was chosen as President of the Senate, and held that post continuously until his resignation in November 2012.  In September 2010, he announced his candidacy for the Republican nomination for governor in the 2011 gubernatorial election.  On May 17, 2011, Williams secured the Republican nomination over Tea Party movement-backed Phil Moffet.  However, he lost the general election by twenty points to incumbent Democratic Governor Steve Beshear.  In November 2012, Williams resigned his Senate seat to accept a circuit court judgeship.

John Warner: 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.

B. L. Shaw: B. L. Shaw, known as Buddy Shaw (born September 6, 1933), is a Republican former member of the Louisiana State Senate for Caddo and Bossier parishes in the northwestern corner of Louisiana.  He defeated fellow Republican Billy Montgomery in the November 17, 2007, general election to procure the District 37 seat vacated by the term-limited Senator Max T. Malone of Shreveport.  Shaw received 7,157 votes (57 percent) to Montgomery's 5,317 (43 percent)

Franklin Foil: Franklin Johnson Foil (born October 31, 1964) is a Republican member of the Louisiana House of Representatives for District 70, which includes a portion of Baton Rouge.  In 2008, he succeeded term-limited Republican Representative Carl Crane, the former chairman of the House Education Committee.  To win the seat, Foil defeated fellow Republican attorney Pat Culbertson.

Carl Isett: Carl Hawkins Isett (born March 7, 1957) is a Certified Public Accountant from Lubbock, Texas, and a Republican former member of the Texas House of Representatives.  First elected in 1996, Isett announced on December 18, 2009, that he would not be a candidate for an eighth two-year term in the Republican primary held on March 2, 2010.  He indicated that he would instead focus on his United States Navy career.  He resigned his seat in the summer of 2010, and it remained vacant until a special election was held in conjunction with the November 2, 2010, general election.  Both contests were won by Isett's fellow Republican John Frullo, who is also a Lubbock accountant.

Alan Schlesinger: Alan Schlesinger (born January 4, 1958) is an American attorney, entrepreneur, politician and member of the Republican Party from the State of Florida.  He has previously served as the Mayor of Derby, Connecticut from 1994 to 1998 and as a member of the Connecticut House of Representatives from 1981 to 1993.  He ran three unsuccessful campaigns for the Republican nomination in Connecticut 's 5 congressional district : in 1984, 1990 and 1998.  He was the Republican nominee for the U.S. Senate in 2006, finishing third with 9.6%, behind incumbent Senator Joe Lieberman, who won with 49.7% and Democrat Ned Lamont, who took 39.7%.  After his defeat, Schlesinger moved to Florida and considered running for Congress from there in 2008 and 2010.  In 2013, he announced that he was running in Florida 's 18 congressional district , in the 2014 elections.  In 2014, he finished in second place for the Republican nomination behind Carl J. Domino.

Leland Christensen: Leland G. Christensen is a Republican member of the Wyoming Senate, representing the 17th district since 2011.  He is currently a candidate for the United States House of Representatives seat being vacated by incumbent Republican Representative Cynthia Lummis.

John Dallum: John H. Dallum is a former politician in the U.S. state of Oregon.  He served in the Oregon House of Representatives for District 59, which covers The Dalles, Madras and John Day.  Dallum, a Republican, was appointed to the legislature in June 2004 to the seat vacated by fellow Republican John Mabrey, who had resigned after being indicted for theft.  He was subsequently elected twice to the House, defeating Democrats Jack Lorts in 2004 and Jim Gilbertson in 2006.  Dallum announced July 16, 2007, that he would resign his seat effective the end of that month.  His stated reason was to take a job as a school superintendent in Valier, Montana, a location nearer his grown children.  Prior to his career as a politician, Dallum was an educator for 35 years in Oregon and Montana.

Thomas M. Davis: 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.  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.  He announced on January 30, 2008, that he would not seek reelection to an eighth term.  Davis resigned from Congress on November 24, 2008.

Supporting paragraphs: Thomas M. Davis John Warner
Answer: Thomas Milburn "Tom" Davis III