When Americans expressed outrage last week over the seizure and surveillance of Verizon's client data by the National Security Agency, President Obama responded: "In the abstract, you can complain about Big Brother . . . but when you actually look at the details, I think we've struck the right balance."

How many records did the NSA seize from Verizon? Hundreds of millions. We are now learning about more potential mass data collections by the government from other communications and online companies. These are the "details," and few Americans consider this approach "balanced," though many rightly consider it Orwellian.

These activities violate the Fourth Amendment, which says warrants must be specific—"particularly describing the place to be searched, and the persons or things to be seized." And what is the government doing with these records? The president assures us that the government is simply monitoring the origin and length of phone calls, not eavesdropping on their contents. Is this administration seriously asking us to trust the same government that admittedly targets political dissidents through the Internal Revenue Service and journalists through the Justice Department?

No one objects to balancing security against liberty. No one objects to seeking warrants for targeted monitoring based on probable cause. We've always done this.

What is objectionable is a system in which government has unlimited and privileged access to the details of our private affairs, and citizens are simply supposed to trust that there won't be any abuse of power. This is an absurd expectation. Americans should trust the National Security Agency as much as they do the IRS and Justice Department.