Massachusetts Congressman Barney Frank has enthusiastically embraced putting the GOP on the defensive over gay marriage.

The openly gay Democrat is among the co-sponsors of a bill that seeks to repeal the Defense of Marriage Act (DOMA). Frank and fellow Democrats, including lead sponsor New York Rep. Jerrold Nadler, introduced the bill on Wednesday.

The legislation was reintroduced after President Barack Obama announced his administration would no longer defend the law in court, prompting House Speaker John Boehner, a Republican, to instruct the House to defend DOMA.

DOMA bans federal agencies from recognizing the legal marriages of gay and lesbian couples and allows states to ignore such marriages from other states. In making his announcement, Obama said he believed parts of the law are unconstitutional.

Republicans have criticized the effort to repeal the law and Obama's decision to no longer defend it in court. Majority Leader Eric Cantor claimed last month that Democrats were politicizing gay rights as a wedge issue against them.

"What do I say to the idea that this is a wedge issue? I say 'Hallelujah,'" Frank told reporters on Wednesday. "The fact that we've now evolved to the point where the Republicans are complaining about the fact that we introduced this bill because it causes them political problems is a great sign of progress. It used to be the other way around."