[Nero Germanicus]

State legislatures passed laws legalizing gay marriage in Vermont, New Hampshire, District of Columbia, New York, Rhode Island, Delaware, Minnesota, Hawaii and Illinois.
Voters approved gay marriage via referendums in California, Washington, Maine, and Maryland.
Court decisions are responsible for gay marriage in Massachusetts, Iowa,
New Jersey, New Mexico, Oregon, and Pennsylvania.
The issue is in the courts in Utah, Oklahoma, Virginia, Texas, Michigan, Idaho and Arkansas.

[Cementjungle]

Voters approved gay marriage via referendums in California, Washington, Maine, and Maryland.

California was a court decision.