On the eve of Tuesday afternoon’s vote by the Senate Intelligence Committee on the confirmation of John O. Brennan as director of the Central Intelligence Agency, the White House agreed to provide more information both on the legal basis for targeted killings and on the terrorist attack in Benghazi, Libya, that killed four Americans last September. With a committee vote set for a closed session beginning at 2:30 p.m., senators will get access to all Justice Department legal opinions on the targeted killing of Americans, the committee’s Democratic chairwoman, Senator Dianne Feinstein of California, said in a statement. Two such...