Has the NSA gone rogue?
October 31, 2013 -- Updated 1519 GMT (2319 HKT)
President Obama has had to answer reports that the U.S. monitored German Chancellor Angela Merkel's cell phone.
- Evidence indicates that the NSA stores contents of phone conversations and e-mails
- NSA can investigate only when it can show reason it might be linked to foreign threat
- Christopher Slobogin: If it is monitoring many thousands of calls, are all those justified?
- Slobogin: Congress must make sure the NSA abides by the laws it has enacted
Editor's note: Christopher Slobogin, who holds Vanderbilt Law School's Milton R. Underwood Chair in Law, is the author of "Privacy at Risk: The New Government Surveillance and the Fourth Amendment."
(CNN) -- The National Security Agency scandal keeps getting juicier. Recent revelations, triggered by ex-NSA employee Edward Snowden's earlier disclosures, indicate that the National Security Agency not only collects volumes of metadata about the phone numbers people use, it routinely stores the contents of phone conversations, text messages, e-mails and Internet activity.
Former Vice President Dick Cheney explains that the collection of all of this information is crucial, because NSA staffers cannot know what bits of it will turn out to be relevant to a counterterrorist investigation.
In fact, the Foreign Intelligence Surveillance Court has agreed with that argument in approving bulk collection of American as well as foreign metadata for the past seven years. And if metadata must be stored for this purpose, it is an easy step from there to conclude that the contents of communications must be stored as well.
The key question then becomes when the NSA may "query" or identify the source of the metadata it has stored and read the communications it has collected. The NSA reports that it conducts queries of metadata only when it has a "reasonable, articulable" suspicion that a number is linked to a foreign threat that has been identified as such by the Foreign Intelligence Surveillance Court. Section 703 of the Patriot Act, as amended in 2008, limits looking at the contents of a communication to situations where the court has found probable cause to believe that information about a foreign threat will be revealed.
Glenn Greenwald on NSA spying on allies
Spy Directors fire back on Capitol Hill
NSA chief: Europeans shared data
Although one could ask for more oversight, this isn't a bad set of legal safeguards. If they were followed, the European naysayers about the NSA's exploits would not be so hot under the collar.
Many countries besides the United States collect and analyze electronic communications for national security purposes. The Wall Street Journal reported Wednesday that France and Spain helped our surveillance efforts by handing over phone records they collected on their citizens. Illustrated by the ease with which this spying took place, these countries impose fewer limitations on their surveillance activities than we do.
The real question is whether we follow those limitations. Although the NSA may not conduct queries or examine content unless it or a court determines that "national security" is at stake, national security is apparently at stake quite often, if the recent reports about monitoring hundreds of thousands of foreigners' calls as well as the calls of foreign leaders are true.
American journalist Glenn Greenwald, the principal conduit for Snowden's revelations, even claims that the NSA is as interested in economic intelligence as it is in exposing terrorist plots. He offers as evidence documents showing that the U.S. has spied on conferences about negotiating economic agreements and on oil companies and ministries that oversee mines and energy resources.
This may be the real reason European leaders are so incensed. Surveillance of terrorists is fine and probably can help them quite a bit. But surveillance of politicians and capitalists crosses boundaries that they might think should not be crossed, at least unless and until their intelligence agencies can do it as well as and as often as the U.S. can.
In the meantime, Congress should get serious about making sure the NSA abides by the laws it has enacted.
Follow us on Twitter @CNNOpinion.
Join us on Facebook/CNNOpinion.
The opinions expressed in this commentary are solely those of Christopher Slobogin.
Today's five most popular stories
Part of complete coverage on
November 21, 2014 -- Updated 1925 GMT (0325 HKT)
Maria Cardona says Republicans should appreciate President Obama's executive action on immigration.
November 21, 2014 -- Updated 1244 GMT (2044 HKT)
Van Jones says the Hunger Games is a more sweeping critique of wealth inequality than Elizabeth Warren's speech.
November 20, 2014 -- Updated 2329 GMT (0729 HKT)
David Gergen: It's deeply troubling to grant legal safe haven to unauthorized immigrants by executive order.
November 21, 2014 -- Updated 0134 GMT (0934 HKT)
Charles Kaiser recalls a four-hour lunch that offered insight into the famed director's genius.
November 20, 2014 -- Updated 2012 GMT (0412 HKT)
The plan by President Obama to provide legal status to millions of undocumented adults living in the U.S. leaves Republicans in a political quandary.
November 21, 2014 -- Updated 0313 GMT (1113 HKT)
Despite criticism from those on the right, Obama's expected immigration plans won't make much difference to deportation numbers, says Ruben Navarette.
November 21, 2014 -- Updated 0121 GMT (0921 HKT)
As new information and accusers against Bill Cosby are brought to light, we are reminded of an unshakable feature of American life: rape culture.
November 20, 2014 -- Updated 2256 GMT (0656 HKT)
When black people protest against police violence in Ferguson, Missouri, they're thought of as a "mob."
November 19, 2014 -- Updated 2011 GMT (0411 HKT)
Lost in much of the coverage of ISIS brutality is how successful the group has been at attracting other groups, says Peter Bergen.
November 19, 2014 -- Updated 1345 GMT (2145 HKT)
Do recent developments mean that full legalization of pot is inevitable? Not necessarily, but one would hope so, says Jeffrey Miron.
November 19, 2014 -- Updated 1319 GMT (2119 HKT)
We don't know what Bill Cosby did or did not do, but these allegations should not be easily dismissed, says Leslie Morgan Steiner.
November 19, 2014 -- Updated 1519 GMT (2319 HKT)
Does Palestinian leader Mahmoud Abbas have the influence to bring stability to Jerusalem?
November 19, 2014 -- Updated 1759 GMT (0159 HKT)
Even though there are far fewer people being stopped, does continued use of "broken windows" strategy mean minorities are still the target of undue police enforcement?
November 18, 2014 -- Updated 0258 GMT (1058 HKT)
The truth is, we ran away from the best progressive persuasion voice in our times because the ghost of our country's original sin still haunts us, writes Cornell Belcher.
November 18, 2014 -- Updated 2141 GMT (0541 HKT)
Children living in the Syrian city of Aleppo watch the sky. Not for signs of winter's approach, although the cold winds are already blowing, but for barrel bombs.
November 17, 2014 -- Updated 1321 GMT (2121 HKT)
We're stuck in a kind of Middle East Bermuda Triangle where messy outcomes are more likely than neat solutions, says Aaron David Miller.
November 17, 2014 -- Updated 1216 GMT (2016 HKT)
In the midst of the fight against Islamist rebels seeking to turn the clock back, a Kurdish region in Syria has approved a law ordering equality for women. Take that, ISIS!
November 17, 2014 -- Updated 0407 GMT (1207 HKT)
Ruben Navarrette says President Obama would be justified in acting on his own to limit deportations