The U.S. Senate’s consideration of new firearm regulations took a legal turn on Tuesday, with conflicting testimony about whether the U.S. Supreme Court’s recent Second Amendment rulings prohibit Congress from adopting measures to reduce gun violence.

"My answer to that is an emphatic ‘no,’ " said constitutional scholar Laurence Tribe, who has argued before the Supreme Court 35 times. Tribe, a Harvard Law School professor, told a Senate subcommittee that he reviewed of the District of Columbia v. Heller ruling from 2008 and McDonald v. Chicago from 2010.