In a speech last week, Al Gore took another swing at the National Security Agency's electronic surveillance program, which monitors international communications when one party is affiliated with terrorists. Specifically, Mr. Gore argued that George Bush "has been breaking the law repeatedly and persistently," and that such actions might constitute an impeachable offense. The question he raises is whether the president illegally bypassed the Foreign Intelligence Surveillance Act (FISA). But the real issue is national security: FISA is as adept at detecting--and, thus, preventing--a terrorist attack as a horse-and-buggy is at getting us from New York to Paris. I have...