California Senator Dianne Feinstein is trying to “cram gay marriages through Congress,” opponents have warned.

Feinstein is the Senate sponsor of a bill that would repeal the Defense of Marriage Act (DOMA), the 1996 that bars federal agencies and the military from recognizing the legal marriages of gay and lesbian couples.

The Democrat-controlled Senate Judiciary Committee is expected on Thursday to vote the bill out of committee.

Andrea Lafferty of the Traditional Values Coalition condemned the move in an “URGENT” email to supporters.

“Senate Democrats led by Dianne Feinstein are once again trying [to] cram gay marriages through Congress! We need to deliver 50,000 signatures in the next 48 hours if we are to fight back against this reckless and liberal attack on marriage!”

“On Thursday, the U.S. Senate Judiciary Committee meets to do the unthinkable – redefine marriage, repeal the Defense of Marriage Act (DOMA), and overturn the will of the people in 41 states across the country,” Lafferty added.

While the bill is expected to clear the committee, the issue is a non-starter in the House, where its speaker, John Boehner, a Republican from Ohio, has approved $1.5 million to defend the law in court.

Social conservative groups Liberty Counsel and Concerned Women for American are also rallying supporters against the bill.

“Natural marriage benefits our society by providing the ideal way to raise future generations, stable relationships, and health benefits that same-sex preferences do not,” Liberty Counsel wrote in a blog post. “Government has the authority to reward and defend natural marriage because of the good it creates in our society.”