President Donald Trump is learning to reframe how he speaks about surveillance. On March 4, he claimed that former President Barack Obama had ordered Trump's "wires tapped," then later claimed "wiretap covers a lot of things," prompting some members of Congress to try to capitalizeon the moment to scrutinize what kind of spying, exactly, is legal when it comes to American citizens.

But even in this environment, there's little hope of reforming a much clearer but unheralded form of spying: police use of stingray devices to track Americans' phones. As Trump surveys the surveillance system at his disposal, he should know that there are at least 471 of the location-spying devices in the U.S. today, according to an exclusive Vocativ survey of known police and other official documents.