Question: In 2010 Richard Jason Satawk "R. J." Harris unsuccessfully challenged a member of what nation for the Republican Party nomination in the primary election for Oklahoma's 4th congressional district?
Sentence (from "Tom Cole"): 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).
Relevant evidence: Yes