"We are no less determined, and we will march on," he said, calling for voting rights and equal opportunities for all Americans.
The outgoing attorney general also blasted a 2013 decision from the Supreme Court that struck down a major provision of the Voting Rights Act.
"While the Court’s decision removed one of the Justice Department’s most effective tools, we remain undaunted and undeterred in our pursuit of a meaningful right to vote for every eligible American," he said.