The Obama administration has offered the Senate expanded access to secret memos authorizing the killings of Americans overseas in a bid to defuse opposition to a judicial nominee that helped author them. A number of senators have voiced opposition to the nomination of David Barron to the U.S. Court of Appeals for the 1st Circuit. While serving in the Justice Department’s Office of Legal Counsel, Barron helped write at least two memos that underpinned the government’s killing of the American-born cleric Anwar al-Awlaki. But senators including Mark Udall of Colorado and Rand Paul of Kentucky have said they will remain opposed to Barron’s nomination unless the memos are released to the public.