Government insiders who engage in unauthorized leaks of classified information are violating their oaths, breaking the law, damaging national security and deserving of punishment. Sometimes those outside government who receive secrets and pass them to others are also breaking the law and deserve punishment. The latter category includes enemy spies. But what about American lobbyists -- and journalists -- who receive secrets and pass them along? In an important trial set to begin in January, the Justice Department has irresponsibly confused the distinction between spying and lobbying. Keith Weissman and Steven J. Rosen, two former employees of AIPAC, the pro-Israel...