Question: What ethnic group does the incumbent who was challenged by R.J. Harris in the 2010 for the  Republican Party nomination  in the primary election for Oklahoma's 4th congressional district?

Texas District 8 of the United States House of Representatives is a Congressional district that includes Montgomery County and Walker County.  It includes much of the northern outlying areas of metro Houston.  The current Representative from District 8 is Kevin Brady and has been since 1997.  For the 2014 election cycle Craig McMichael, a veteran of the Marine Corps, and network engineer had challenged and lost to incumbent Kevin Brady in the Republican Primary.  In the 2014 General Election, Brady faced off against the Libertarian Party candidate, Ken Petty of Spring, Texas, who won his nomination in the Libertarian District Convention.  No Democrat ran.  In the 2016 election, the 20-year incumbent was challenged by 3 challengers: Andre Dean, Craig McMichael, and Steve Toth.  As of August 2017, Brady is expected to face Democrat Steven David in the 2018 election as well as Independent candidate Todd Carlton.  David is the first Democrat to challenge Brady since the 2012 election. <SEP> Richard Jason Satawk "R. J." Harris (born November 16, 1972) is a United States Army National Guard warrant officer, politician, law student and former Air Traffic Controller.  He was a candidate for the Libertarian Party's 2012 nomination for President of the United States.  He ran as an independent candidate for the same congressional seat in 2012.  In 2010, he unsuccessfully challenged incumbent Tom Cole for the Republican Party nomination in the primary election for Oklahoma's 4th congressional district. <SEP> Thomas Jeffery Cole (born April 28, 1949) is the U.S. Representative for Oklahoma 's 4 congressional district , serving since 2003.  He is a member of the Republican Party.  He is a Deputy Majority Whip.  The chairman of the National Republican Congressional Committee (NRCC) from 2006 to 2008, he was, during his tenure, the fourth-ranking Republican leader in the House.  As of 2015, Cole – a member of the Chickasaw Nation – is one of only two registered Native Americans in Congress (the other being fellow Oklahoman Markwayne Mullin). <SEP> Pennsylvania's 10th Congressional District is located in the central and northeast regions of the state.  The district was one of the 12 original districts created prior to the 4th Congress.  It is currently represented by Republican Tom Marino, who defeated Democratic incumbent Chris Carney during the 2010 U.S. House elections.  In 2006, the 10th district experienced one of the greatest party shifts among all House seats that switched party control: in 2004, Republican Don Sherwood won with an 86% margin of victory over his nearest opponent and two years later, Carney unseated Sherwood by a 53%–47% margin.  In 2008, Carney won reelection by 12 points but the district swung back in 2010, electing Tom Marino.  The district is mostly Republican in its political composition, an aspect of the district that is reflected especially well in presidential elections.  In 2004, President George W. Bush won 60 percent of the vote in the district and in 2008, Senator John McCain beat Senator Barack Obama here by a margin of 54 percent to 45 percent.  Nonetheless, Carney easily won reelection as a Democrat the same year McCain won the district.  However, in the 2010 midterm elections, Marino unseated Carney by a 55%–45% margin.  In 2016, local business man and former mayor of Lewisburg, Pennsylvania, Mike Molesevich challenged Marino for the seat, but he fell to the Republican in November by more than two to one.  Marino remains the congressman in the 10th district, but he has expressed interest in a 2018 gubernatorial run rather than standing for reelection.