Question: Kansas's 1st congressional district is a congressional district in the U.S. state of Kansas, Huelskamp was re-elected twice in 2012 and 2014, but lost the 2016 Republican primary for a fourth term to which obstetrician, and an American politician?
Context: George McGovern, a Democratic Party politician from South Dakota, was first elected to the United States House of Representatives to represent South Dakota's 1st congressional district in 1956.  He was re-elected in 1958, before making an unsuccessful run for the United States Senate in 1960 against Republican incumbent Karl Earl Mundt.  After serving in the John F. Kennedy administration as director of the Food for Peace program, McGovern ran again for the Senate and narrowly prevailed over appointed Senator Joseph H. Bottum.  In 1968, McGovern unsuccessfully sought the Democratic Party's presidential nomination at the Democratic National Convention and was re-elected to the Senate over former Governor of South Dakota Archie M. Gubbrud.  In 1972, McGovern was successful in his campaign for the Democratic presidential nomination, but lost the election in a landslide to incumbent President Richard Nixon.  McGovern was re-elected to the Senate in 1974 over Vietnam War veteran Leo K. Thorsness, but lost re-election in 1980 to then-U.S. Representative James Abdnor.  McGovern made a final unsuccessful run for president in United States presidential election, 1984. David M. Gowan, Sr. an American politician who served as Speaker of the Arizona House of Representatives for the 2015-2017 legislative session and a Representative for Legislative District 14 from January 14, 2013 to January 9, 2017, when he term limited.  Gowan served consecutively from January 2009 until January 14, 2013 in the District 30 seat which redistricted into District 14 in 2012.  In 2013, he was elected Majority Leader of the Republican Party in the House of Representatives.  In 2015, Gowan was elected to serve as Speaker of the House.  On October 5, 2015, Gowan announced his candidacy for Arizona's 1st congressional district, but withdrew before the Republican primary. Roger W. Marshall (born August 9, 1960) is an American politician and obstetrician.  He is the Republican U.S. Representative for 2=nd Kansas's 1st congressional district is a congressional district in the U.S. state of Kansas.  Commonly known as "The Big First", the district encompasses 63 counties in western and northern Kansas (more than half of the state), making it the 12th largest congressional district in the nation.  Located within the district are Manhattan, Salina, Dodge City, Emporia, Garden City, Hays and Hutchinson.  From 2011 to 2017, the district was represented by Republican Tim Huelskamp who was originally elected in 2010 to succeed fellow Republican Jerry Moran who ran successfully for the U.S. Senate seat formerly held by now Governor Sam Brownback.  Huelskamp was re-elected twice in 2012 and 2014, but lost the 2016 Republican primary for a fourth term to obstetrician Roger Marshall. Jonathan Paton (born June 10, 1971) is a former Arizona Republican candidate for the U.S. House of Representatives in Arizona's 8th District and an intelligence officer in the U.S. Army Reserve who served in Operation Iraqi Freedom.  Paton was first elected to southern Arizona's Legislative District 30 as a member of the Arizona House of Representatives in 2004.  He won reelection and began his second term in February 2007.  In 2008, he was elected to the Arizona Senate, again representing Legislative District 30.  On January 17, 2010, Paton announced he would be challenging Democratic U.S. Representative Gabrielle Giffords.  He subsequently resigned from the state Senate to focus his efforts on campaigning for Congress.  Paton lost in the 2010 Republican primary and endorsed his former opponent, Jesse Kelly.  He ran for Congress again in 2012, this time in Arizona's newly formed 1st Congressional District, ending in close defeat against Democratic opponent Ann Kirkpatrick. Charles Kong Djou (born August 9, 1970) is an American politician who served for 7 months as U.S. Representative for Hawaii's 1st congressional district in 2010–11.  As a member of the Republican Party, Djou won his congressional seat in a May 2010 special election where the Democratic vote was split between several candidates, but was defeated in the general election in November after the Democratic primary provided a single opponent.  Djou, who previously served in the Hawaii House of Representatives and the Honolulu City Council, is the first Thai American and the first Chinese American Republican to serve in the U.S. House of Representatives.  In June 2016, Djou entered the race for Mayor of Honolulu, which he lost to Democratic incumbent Kirk Caldwell. Bradley Roberts Byrne (born February 16, 1955) is an American business attorney and Republican congressman for Alabama's 1st congressional district.  He served as chancellor of the Alabama Community College System from 2007 until his resignation in 2009 to run for the 2010 Republican nomination for Governor of Alabama.  He was also a member of the Alabama State Senate from 2003 to 2007.  He holds a degree from Duke University, where he was a member of the Phi Delta Theta Fraternity, and he also attended the University of Alabama.  In December 2013, he won a special election to represent Alabama's 1st congressional district in the U.S. House of Representatives. Georgia's 1st congressional district is a congressional district in the U.S. state of Georgia.  The district is currently represented by Republican Buddy Carter, though the district's boundaries have been redrawn following the 2010 census, which granted an additional congressional seat to Georgia.  The first election using the new district boundaries (listed below) were the 2012 congressional elections. Hawaii's 1st congressional district is a congressional district in the U.S. state of Hawaii.  The district is located entirely on the island of Oahu, encompassing the urban areas of the City and County of Honolulu, a consolidated city-county that includes Oahu's central plains and southern shores, including the towns of Aiea, Mililani, Pearl City, Waipahu and Waimalu.  The district is smaller and more densely populated than the 2nd Congressional District (which includes the rest of the state).  It is the only majority-Asian district in the United States. Thomas "Rico" Oller (born July 16, 1958) is a Republican U.S. politician from California.  He served in the California State Assembly, representing the 4th District from 1996 to 2000, and the California State Senate, representing the 1st district from 2000 to 2004.  In 2004, Oller ran for Congress in California's 3rd congressional district, but narrowly lost the Republican primary to former California Attorney General Dan Lungren.  On January 10, 2008, Oller again ran for Congress, this time in California's 4th congressional district, for a seat being vacated by retiring Congressman John Doolittle.  He faced opposition from former Congressman Doug Ose.  On March 4, 2008, Oller dropped out of the race when California State Senator Tom McClintock (R-Thousand Oaks) announced that he was running for Doolittle's seat.  In a statement, Oller said his decision was "a bitter pill indeed for me to swallow."  But, he said he was endorsing McClintock to prevent the election of Ose, whom he labeled as "an unarguably liberal Republican."  Oller ran for the newly former 5th Assembly District in 2012 facing Madera County Supervisor Frank Bigelow in the November general election.  Oller lost to Bigelow by 5.7%.
Answer: Roger Marshall