Fox News: Feds used FISA, possible stingray to spy on Giuliani-connected busines
sman, filing says.
[1]https://www.foxnews.com/politics/giuliani-associate-government-hiding-fisa-mo
nitoring-possible-stingray-phone-tracking

References

   1. https://www.foxnews.com/politics/giuliani-associate-government-hiding-fisa-monitoring-possible-stingray-phone-tracking