https://apps.texastribune.org/features/2019/2020-primary-election-ballot/
http://ballotpedia.org/Election_results,_2018_texas
https://apps.texastribune.org/elections/2018/primary-election-results/
https://www.sos.state.tx.us/elections/voter/current.shtml
https://www.sos.state.tx.us/elections/candidates/index.shtml
https://statutes.capitol.texas.gov/Docs/EL/htm/EL.141.htm
https://statutes.capitol.texas.gov/Docs/EL/htm/EL.192.htm
https://avalon.law.yale.edu/18th_century/art6.asp