All US states allow insurance companies to sell and provide domestic partner coverage.
No. Some insurance companies offer domestic partner coverage in Florida and you are free to purchase such a policy. If your employer wants to buy coverage for you and your domestic partner, then it can. The state of Florida will not stop you. It may impose income tax on the value of the domestic partner coverage as "imputed income."
Several insurance companies now have "Domestic Partner" plans available. This includes coverage regardless of gender and/or marrital status. Check with the individual companies to see if they offer the coverage.
AmeritasCIGNAGreat West LifeGroup Health Northwest
Yes. There are insurance companies that offer policies with domestic partner coverage in Connecticut. (Please see related question below for the names of the companies.)
AmeritasCIGNAGreat West LifeNew York Life and Health
AmeritasCIGNAGreat West LifeNew York Life and Health
AmeritasCIGNAGreat West LifeNew York Life and Health
AmeritasCIGNAGreat West LifeNew York Life and Health
AmeritasCIGNAGreat West LifeNew York Life and Health
AmeritasCIGNAGreat West LifeNew York Life and Health
AmeritasCIGNAGreat West LifeNew York Life and Health