Spy chief: Estimating people being spied on could require more surveillance

Quantifying the numbers of Americans being inadvertently spied upon could require the intelligence community to be even more invasive than it is now, the nation’s top intelligence official said Monday.

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“If such an estimate were easy to do, and explainable, without compromise, we would’ve done it a long time ago,” Director of National Intelligence James Clapper told reporters in Washington. “We’re looking at several options right now, none of which are optimum. They all have drawbacks.”