In California, Gov. Arnold Schwarzenegger signed a bill that allows registered domestic partners to file joint tax returns and have their earned income treated as community property for state tax purposes. There is now virtually no distinction between the rights of married couples and those of domestic partners under state law.
DPs, however, are denied the federal spousal benefits, and must file separate federal tax returns. The same also is true of same-sex couples legally married in Massachusetts, thanks to the federal Defense of Marriage Act.
Last year, Schwarenegger vetoed a bill that would have provided for same-sex marriage outright in the Golden State, citing the defeat of same-sex marriage when the electorate voted on this issue. But if the domestic-partner route becomes virtually the same as marriage (at least at the state level), then the cultural shift that deflates popular opposition to the "m" word is well underway.