The U.S. spy chief is looking at ways to let you know how many Americans were wrapped up in surveillance targeting foreigners.

FOX's Jared Halpern has more from Washington:

Bipartsian pressure on Capitol Hill has National Intelligence Director James Clapper considering ways to make public, an estimate of the number of Americans who had data incidentally caught up in overseas spy operations:

(Clapper) "The irony is, as we've pointed out many times, is that to actually render an accurate number we actually have to be more invasive."

Clapper tells reporters there are several options, he says none are optimal.

Some members of Congress argue a public estimate of how many were Americans had data collected during attempts to grab foreign internet traffic is needed to gauge potential reforms to the surveillance program.

In Washington, Jared Halpern, FOX News.