The Washington Times:

Opponents of Maryland’s same-sex marriage law said Wednesday they have collected more than half the signatures necessary to force a November referendum.

The Maryland Marriage Alliance says it has collected more than 30,000 signatures from voters hoping to overturn the law, which was passed in February by the General Assembly and signed by Democratic Gov. Martin O'Malley.

Petitioners have until June 30 to collect 55,736 valid voter signatures, which must be validated by the state Board of Elections. They must submit one-third of those signatures — or 18,579 of them — by May 31.

...No state has ever upheld gay marriage in a referendum, but more than 30 states have rejected it.