(CNN) – Republicans who voted to spend millions in taxpayer dollars defending the federal ban on same-sex marriage are "irresponsible," the House Democratic leader Rep. Nancy Pelosi argued Wednesday.
Speaking to reporters after attending oral arguments at the Supreme Court on the legality of the Defense of Marriage Act, Pelosi said the decision by GOP leaders in the House to pay to defend DOMA in court was a violation of lawmakers' oaths to uphold the Constitution.
"The behavior of Republicans in the House of Representatives on this subject has been so irresponsible," Pelosi said, equating the defense of DOMA in court to defending "increasing discrimination in our society."
"It's just plain wrong," she said.
The Bipartisan Legal Advisory Group, or BLAG, took up the defense of DOMA after President Barack Obama instructed his Justice Department to stop enforcing the law. Pelosi said the two Democratic members of the panel – herself and Minority Whip Steny Hoyer – both voted against defending the law in court.
Originally capped at $500,000, the cost of defending DOMA has risen to $3,000,000, a figure which Pelosi said Wednesday "speaks very loudly" to Republicans' priorities.
The man paid to defend DOMA at the Supreme Court, Paul Clement, has a "stale role to play in life," Pelosi added.
After hearing oral arguments, the minority leader predicted DOMA would be overturned
"On the basis of what I heard, the questions of the justices, the response of the participants, I'm very optimistic that DOMA will be struck down," Pelosi said.