Question: What is the rank of the incumbent that RJ Harris challenged in 2010?

Stayce D. Harris is a United States Air Force Lieutenant General.  She currently serves as the Assistant Vice Chief of Staff and Director, Air Staff, Headquarters, United States Air Force.  She also serves as Deputy Chairman of the Air Force Council, and is the Air Force accreditation official for the international Corps of Air Attachés. Harris' promotion is a first for African-American females, as she is the first to hold the three-star rank in the Air Force.  Additionally, she is the first Air Force Reservist to be promoted to the three-star rank other than the Commander, Air Force Reserve Command.  Prior to her current assignment Harris was Commander, Twenty-Second Air Force. <SEP> Field Marshal Gardihewa Sarath Chandralal Fonseka, RWP, RSP, VSV, USP, MP, rcds, psc (Sarath Fonseka) (Sinhalese: ෆීල්ඩ් මාෂල් සරත් ෆොන්සේකා , Tamil: பீல்ட் மார்ஷல் சரத் பொன்சேகா , born 18 December 1950) is a Sri Lanka's highest rank soldier and politician who was the first Sri Lankan Army officer to be promoted to the rank of Field Marshal.  He was the eighteenth Commander of Sri Lankan Army, and under his command the Sri Lankan Army ended the 26-year Sri Lankan Civil War in 2009, defeating the rebel Liberation Tigers of Tamil Eelam; he thereafter briefly served as the Chief of Defence Staff.  After retiring from the Army with the rank of General, he entered politics as the common opposition candidate in the 2010 presidential election contesting against President Mahinda Rajapaksa.  Following his controversial defeat in the presidential election he was elected to Parliament in the general election that followed.  Soon after he was made a political prisoner and lost his parliamentary seat.  Fonseka supported Maithripala Sirisena in the 2015 presidential election and following his victory, the newly appointed President Sirisena gave Fonseka a full pardon reinstating his civic rights, military rank and decorations.  Later he was promoted to the newly created rank of Field Marshal on 22 March 2015.  On 9 February 2016 he was appointed to Parliament, and he was appointed Cabinet Minister for Regional Development on 25 February 2016. <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.  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).  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. <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.