Florida Rep. Ilena Ros-Lehtinen is coming under attack for her support of a bill that would repeal the Defense of Marriage Act (DOMA), the 1996 law which forbids federal agencies from recognizing the legal marriages of gay and lesbian couples.

Ros-Lehtinen on Friday became the first Republican to sign onto the effort, becoming the 125th co-sponsor of the proposed legislation in the House.

“I voted against the constitutional amendment defining marriage, so I'm pleased to co-sponsor the repeal of DOMA and work with my colleagues on marriage equality,” said Ros-Lehtinen in a statement.

Brian Brown, the president of the National Organization for Marriage (NOM), the nation's most vociferous opponent of gay marriage, targeted the lawmaker in an email to supporters.

“Gay marriage activists know they don't need to persuade the Republican grassroots to support same-sex marriage – they just need to split off enough GOP elite opinion to provide cover as they force SSM on the entire nation. Several prominent GOP elites have already signed on, and gay marriage activists are spending millions of dollars to pressure and persuade more Republican lawmakers that they can support same-sex marriage without consequence,” Brown said.

“And maybe it's time Congresswoman Ros-Lehtinen started looking for a new job,” he added.

Tony Perkins of the Christian conservative Family Research Council (FRC) stated Ros-Lehtinen “has joined the dark side by becoming the first Republican to co-sponsor bills that boost counterfeit marriage.”