Political Party Directory (from Secretary of State website)
https://www.sos.state.co.us/pubs/elections/Candidates/PoliticalPartyDirectory.html
(includes: Colorado Democratic Party , Colorado Republican Party, American Constitution Party, Approval Voting Party, Green Party of Colorado, Libertarian Party of Colorado, Unity Party of Colorado)
Mesa County: mesacountydems.org
National: democrats.org
American Constitution Party: http://www.americanconstitutionparty.com/
Approval Voting Party: https://www.approvalvotingparty.com/
Libertarian Party: https://lpcolorado.org/
Unity Party of Colorado: https://unitypartycolorado.com/
Unity Party of America: https://unityparty.us/