WASHINGTON — Decades ago, the C.I.A. recruited and carefully cultivated a midlevel Russian official who began rapidly advancing through the governmental ranks. Eventually, American spies struck gold: The longtime source landed an influential position that came with access to the highest level of the Kremlin.
As American officials began to realize that Russia was trying to sabotage the 2016 presidential election, the informant became one of the C.I.A.’s most important — and highly protected — assets. But when intelligence officials revealed the severity of Russia’s election interference with unusual detail later that year, the news media picked up on details about the C.I.A.’s Kremlin sources.
C.I.A. officials worried about safety made the arduous decision in late 2016 to offer to extract the source from Russia. The situation grew more tense when the informant at first refused, citing family concerns — prompting consternation at C.I.A. headquarters and sowing doubts among some American counterintelligence officials about the informant’s trustworthiness. But the C.I.A. pressed again months later after more media inquiries. This time, the informant agreed.