used on General Flynn during the Obama Administration?
http://www.foxnews.com/politics/2017/02/14/trump-gop-lawmakers-eye-illegal-leaks-in-wake-flynn-resignation.html
....Yet the leak itself is raising serious questions -- because when the intelligence community captures phone calls of an American inside the U.S., even if the discussion involves a foreign national (in this case an ambassador), steps must be taken to shield the American caller's identity.
Recent leaks also have revealed reported details from phone calls between Trump and the leaders of Australia and Mexico and from the intelligence community investigation into Russian interference in the U.S. presidential campaign.
"If [the Flynn conversation] was picked up inadvertently, then that would have had to have been approved by someone in the last administration to actually unmask his name so that the FBI or intelligence officials knew who it was on the other end of the phone talking to the Russian ambassador," Nunes told Fox News. "If, in fact, the press reports are right, someone made the decision to deliberately listen to General Flynn's phone calls and that is, I think, unprecedented, unwarranted and flat-out wrong."
Nunes said he is going to “be asking the FBI to do an assessment of this to tell us what's going on here because we cannot continue to have these leaks as a government."
Senate homeland security committee Chairman Ron Johnson, R-Wis., told Fox News that “somebody in the nebulous intelligence community” would have had access to the Flynn discussions.
“Who tapped the phones, who was listening to it, who leaked it? I think those are legitimate questions to ask,” he told Fox News on Tuesday. “Leaks of this nature are incredibly damaging to America … and we need to look into it.”
A congressional source told Fox News they believe the intelligence was known to a small circle of Obama administration officials and appointees at the end of last year, including some working within the intelligence community -- and the leaks were targeted and coordinated to undermine the administration.