Resources by state

Alaska
https://lam.alaska.gov/misinformation

Arizona
https://www.azcourts.gov/cscommittees/Task-Force-on-Countering-Disinformation

Colorado
https://www.sos.state.co.us/pubs/elections/ElectionIntegrity/index.html

Hawaii
https://oip.hawaii.gov/combat-misinformation/

Idaho
https://libraries.idaho.gov/fake-news-bots-and-incentivized-reviews-some-tools-for-fact-checking/

Illinois
https://www.elections.il.gov/VotingAndRegistrationSystems/ElectionSecurity/CombatingDisinformation.aspx
https://www.illinoiscivics.org/guardians/media-literacy-toolkit/

Indiana
https://www.in.gov/cybersecurity/blog/posts/election-disinformation-misinformation-campaigns-it-happens-trust-yourself-what-to-know/
https://www.in.gov/sos/indianamoneywise/blog/posts/covid-19-vaccine-scams-and-misinformation/

Kentucky
https://sos.ky.gov/elections/Pages/Rumor-Control.aspx

Maryland
https://www.elections.maryland.gov/press_room/rumor_control.html
https://govstatus.egov.com/md-coronavirus-rumor-control

Michigan
https://www.michigan.gov/sos/0,4670,7-127-1633_106165_107264—,00.html
https://www.michigan.gov/sos/0,4670,7-127-1633_100423_102534_102535—,00.html

Nevada
https://mynevadacounty.com/3460/Correcting-Misinformation

New Jersey
https://www.njhomelandsecurity.gov/disinformation
https://www.njhomelandsecurity.gov/covid19

New York
https://covid19vaccine.health.ny.gov/combatting-misinformation-about-covid-19-vaccines

North Carolina
https://www.ncsbe.gov/about-elections/election-security/combating-misinformation

Ohio
https://www.ohiosos.gov/globalassets/about/office-initatives/dec/disinformationoverview.pdf

Vermont
https://sos.vermont.gov/elections/election-info-resources/myth-v-fact/
https://vsp.vermont.gov/covid19/avoiding_disinformation

Virginia
https://www.elections.virginia.gov/voter-ed/mythbusters/
https://www.oit.va.gov/news/article/?read=the-flow-of-misinformation

Washington
https://www.sos.wa.gov/_assets/library/libraries/firsttuesdays/20190205_fakenews_learnerpacket.pdf