Domestic Partnership in the U.S.:
https://en.wikipedia.org/wiki/Domestic_partnership_in_the_United_States
http://www.ncsl.org/research/human-services/civil-unions-and-domestic-partnership-statutes.aspx
http://family.findlaw.com/domestic-partnerships/state-laws-domestic-partnerships.html
Domestic Partnership Benefits – how to find benefits in a given state: http://www.nolo.com/legal-encyclopedia/domestic-partnership-benefits-29916.html
Insurance Links for Key States:
Arizona Department of Insurance: https://insurance.az.gov
Colorado Department of Regulatory Agencies (insurance): https://www.colorado.gov/pacific/dora/colorado-insurance-commissioner
New Mexico Department of Insurance: http://www.osi.state.nm.us/home.aspx
Texas Department of Insurance: http://www.tdi.texas.gov/health/
The Affordable Care Act: https://www.healthcare.gov
Information About Medicare: https://www.ssa.gov/pubs/EN-05-10043.pdf