Question: Who is this retired American politician who was a U. S. representative of Oklahoma's 2nd Congressional District whom Oklahoma politician Jim Wilson ran against during the July 27 Democratic primary?
Context: Jacqueline R. Walorski (born August 13, 1963) is an American politician who has been the U.S. Representative for Indiana's 2nd congressional district since 2013.  She is a member of the Republican Party, and she was a member of the Indiana House of Representatives, representing Indiana's 21st district, from 2005 to 2010.  In 2010, Walorski won the Republican nomination for Indiana's 2nd congressional district, but narrowly lost in the general election to Democratic incumbent Joe Donnelly.  In 2012, Walorski went on to win the open seat. Daniel David Boren (born August 2, 1973) is a retired American politician, who served as the U.S. Representative for Oklahoma 's 2 congressional district from 2005 to 2013.  The district includes most of the eastern part of the state outside of Tulsa.  He is a member of the Democratic Party. David E. Boswell is a former Democratic member of the Kentucky Senate, having represented the 8th District from 1990 to 2011.  Earlier he was a member of the Kentucky House of Representatives from 1978 through 1983.  In 1983, he defeated Republican Richard Turner to be elected Agriculture Commissioner of Kentucky with 64%.  In 1987, he was a candidate for Lieutenant Governor unsuccessfully in the Democratic Primary on a ticket paired with Grady Stumbo.  The Stumbo-Boswell ticket came in fourth.  He returned the political arena and was the 2008 Democratic nominee for U.S. Representative for Kentucky's 2nd Congressional District, and lost to Republican nominee Brett Guthrie.  The congressional seat became open because of the retirement of Republican Ron Lewis. Markwayne Mullin (born July 26, 1977) is an American politician and businessman who has been the United States representative for Oklahoma's 2nd congressional district since 2013.  He owns several businesses, which he took over at twenty, when his father became ill.  Mullin, a member of the Republican Party, was elected to the U.S. House of Representatives in the 2012 elections, succeeding Democratic representative Dan Boren. Edward Espenett "Ed" Case (born September 27, 1952) is an American Democratic politician who represented Hawaii in the United States House of Representatives from 2002 to 2007.  Case, a Blue Dog Democrat, first came to prominence in Hawaii as majority leader of the Hawaii State Legislature and for his campaign for Governor of Hawaii in 2002.  First elected to the House of Representatives in 2002 in a special election to fill the seat of Patsy Mink, who died of pneumonia, Case represented Hawaii's 2nd congressional district until 2006, when he chose not to run for another term in the House of Representatives so he could challenge Senator Daniel Akaka in the Democratic primary for Akaka's U.S. Senate seat.  Case lost the primary election 53%–46%. Deborah L. "Debbie" Halvorson (born March 1, 1958) is the former U.S. Representative for  's 11th congressional district , serving from 2009 until 2011.  Previously, she served in the Illinois Senate from 1997 through 2009.  She is a member of the Democratic Party.  In September 2011, she filed to run in the newly redistricted 2nd congressional district but was defeated in the Democratic primary by the incumbent, Jesse Jackson, Jr. Jim Wilson was an Oklahoma Senator from District 3, which includes Adair, Cherokee and Sequoyah counties, from 2004 to 2012.  He earlier was a member of the Oklahoma House of Representatives from 2000 through 2004.  He ran unsuccessfully against Democratic Incumbent US Rep. Dan Boren in Oklahoma's 2nd Congressional District in the July 27 Democratic primary. George Faught (born July 14, 1962) is an American businessman and Republican politician from Oklahoma.  Faught was Representative for District 14 in the Oklahoma House of Representatives from 2007 to 2012.  House District 14 encompasses Muskogee, Fort Gibson, Braggs, Hulbert, and outlying areas.  When the 51st Legislature was opened on February 5, 2007, Faught became the only Republican in state history to represent the historically Democratic 14th House District.  He announced his candidacy for Oklahoma's 2nd congressional district on July 14, 2011. John M. Nutting VII (born August 29, 1949) is an American politician and dairy farmer from Maine.  Nutting was a member of the Maine House of Representatives from 1986 to 1992 and served in the Maine Senate from 1996 to 2002 and again from 2004 to 2010.  In 2002, Nutting sought the Maine Democratic Party's nomination for Maine's 2nd congressional district.  He finished fourth, losing in the Democratic primary to Mike Michaud. Will Shafroth was a candidate in the Democratic primary to replace Mark Udall in Colorado's 2nd congressional district in 2008.  Will is a fourth-generation Coloradan and the great-grandson of one of Colorado Governor John Shafroth, a man who was the principal author in the U.S. House of the Antiquities Act, which gives the President the authority to set aside lands for conservation and cultural resource preservation purposes, as well as the establishment of Rocky Mountain National Park.  Born in Arapahoe County in 1957, Will has devoted his adult life to public service, particularly to conservation of land, water and wildlife.  Despite winning the endorsement by both major newspapers (The Denver Post and Rocky Mountain News) and many local and state leaders, he was defeated in August 2008 by Jared Polis, who outspent Shafroth 5-1 in the primary.  Polis was eventually elected as the Member of Congress from the 2nd congressional district.
Answer: Dan Boren