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Riggleman was defeated by challenger Bob Good in a drive-thru convention held at the Tree of Life Ministries in Campbell County on June 13, 2020. There were 2,437 delegates and Good won 58 percent of the vote.  
- Web. Bob Good defeats Rep. Denver Riggleman in Republican convention for 5th District, Amy Friedenburger, News Article, Roanoke Times, June 14, 2020, retrieved June 15, 2020.
- Web. Rep. Denver Riggleman beat out by Bob Good in GOP primary convention, Ali Sullivan, News Article, Cavalier Daily, June 14, 2020, retrieved June 15, 2020.