Question: Richard Jason Satawk "R. J." Harris, is a United States Army National Guard warrant officer, politician, law student and former Air Traffic Controller, in 2010, he unsuccessfully challenged which incumbent Republican, for the Republican Party nomination in the primary election for Oklahoma's 4th congressional district?
Sentence (from "Tom Cole"): Thomas Jeffery Cole (born April 28, 1949) is the U.S. Representative for Oklahoma 's 4 congressional district , serving since 2003.
Relevant evidence: Yes