John was born in Forest City, Iowa and graduated high school in Spencer, Iowa. He completed undergraduate studies at the University of South Dakota and then worked as a journalist in Pierre, South Dakota, where he covered city, county, and state government. He attended Creighton University School of Law, and during law school, he competed in the Saul Lefkowitz Moot Court Competition and won best brief in the nation out of 76 teams from 54 law schools. John then interned with the Trademark Trial and Appeal Board in Alexandria, Virginia. He graduated in 2017 with a juris doctorate and a master of government organization and leadership.