Maggie Gallagher of the National Organization for Marriage (NOM) has claimed that a gay marriage law in Maryland is primarily about Democratic leaders lining their campaign coffers.

Maryland Governor Martin O'Malley signed the bill approved by lawmakers into law during a ceremony surrounded by supporters held in Annapolis on Thursday.

O'Malley, who had championed the bill in his annual State of the State address and at committee hearings on the issue, said he supported marriage equality because he felt the state had an obligation to protect the children of gay couples equally.

“We are one Maryland and all of us at the end of the day want the same things for our children. We want them to live in a loving, caring and committed home that is protected equally under the law,” O'Malley told supporters at Thursday's event.

NOM, the nation's most vociferous opponent of gay marriage, is supporting the Maryland Marriage Alliance's campaign to block the law from taking effect by putting it up for a popular vote in the fall.

Passage of the law, Gallagher told the Baltimore Sun, was about “Democratic leaders looking to please one of their big-money constituencies.” She added that of the 5 states with possible 2012 ballot questions on the issue, Maryland is the one she's “least worried about.”

“There is no big call for this among voters,” she said.