THE capital is in the throes of déjà vu and preview as it plunges back into Clinton Rules, defined by a presidential aide on the hit ABC show “Scandal” as damage control that goes like this: “It’s not true, it’s not true, it’s not true, it’s old news.” The conservatives appearing on Benghazi-obsessed Fox News are a damage patrol with an approach that goes like this: “Lies, paranoia, subpoena, impeach, Watergate, Iran-contra.” (Though now that the I.R.S. has confessed to targeting Tea Party groups, maybe some of the paranoia is justified.) Welcome to a glorious spring weekend of accusation and...