Forty years ago, when I worked as legal counsel for the Senate Foreign Relations Committee, we occasionally pulled all-nighters reconciling the House and Senate versions of a bill. Inevitably, we haggled over the wording, each side trying to preserve the language that would please our respective bosses. One evening, as we were toiling over a bill that contained provisions on foreign aid, human rights, and arms sales of keen interest to the State Department and the Pentagon, I set off through the warrenlike offices of the Rayburn Building in search of coffee. Opening the wrong door, I was surprised…