AIPAC?

EDIT: Aside from the obvious pernicious foreign interference in our elections which is absolutely staggering, not many people remember this scandal: https://en.wikipedia.org/wiki/Lawrence_Franklin_espionage_sc...

Or their role in our invasion of Iraq: https://www.theatlantic.com/politics/archive/2007/10/aipac-a...

Jonathan Pollard stole an eyewatering amount of secrets for Israel, including the most-critical US nuclear blueprints and designs. The intelligence community wanted him to die in jail, but the Israeli Lobby, 70 Knesset members, President Shimon Peres, countless Jewish groups and figures kept applying pressure until he was paroled after 30 years served. Was such a storm in the intelligence community (because of the sensitivity of stuff stolen) that CIA chief tenet threatened to resign if he was pardoned.

Maybe this guy, but he died last year

https://en.m.wikipedia.org/wiki/Robert_Hanssen