Former House Speaker Newt Gingrich and Iowa Representative Steve King want Congress to counter President Obama's decision to no longer defend the Defense of Marriage Act (DOMA) by zeroing out the Department of Justice's budget.

The Clinton-era law bans federal agencies from recognizing the legal marriages of gay and lesbian couples and allows states to ignore such marriages. Attorney General Eric Holder said on Wednesday that he and the president believe parts of the law are unconstitutional.

“We have the authority to do a few things, and one of them is to control the budget,” King told ABC News.

“To continue funding a Justice Department that defies their oath to the Constitution and refuses to enforce the laws of the U.S. is a terrible precedent to tolerate. So the first thing is to send a very strong message by cutting the funding to the Justice Department.”

In an interview with, Gingrich, a potential 2012 GOP presidential candidate, said the decision was a “violation” of the president's “Constitutional oath.”

“I believe the House Republicans next week should pass a resolution instructing the president to enforce the law and to obey his own Constitutional oath,” Gingrich said, “and should say, if he fails to do so, that they will zero out the office of Attorney General.”