The CIA operates in stealth; it is associated with some of the worst abuses of power in recent American history, including assassinations, coups, and torture; it has military capabilities. Congress needs to be firmly in control of its relationship with such an agency. The Constitution demands no less.
We can all agree that historical understandings of the dividing line between war and law enforcement do not fit well the kind of conflicts our nation faces today. But the solution to that quandary should not be to cede all discretion to an Executive that works in the shadows. There are other unaddressed needs at work, among them the imperative to cut the public in on the discussion and the decision-making.