Kudos to Esurance.com for doing this.
Here are the states:
Esurance has already offered similar car insurance savings for same-sex
partners in Calif., Ill., Ore., and Wash. Now, customers in Ala., Ariz.,
Colo., Conn., Ga., Ind., Ky., Md., Minn., Miss., Nev., N. J., Ohio,
Okla., Pa., S.C., Tenn., Texas, Utah, Va., and Wisc.