Maybe it's this guy:
https://twitter.com/DavidCornDC
Mother Jones story
By the third quarter of 2016 many news organizations knew about the existence of the dossier, which had been described as an "open secret" among journalists, but chose not to publish information that could not be confirmed.[2][63]
By October 2016, Steele had compiled 33 pages (16 memos), and he then passed on what he had discovered to David Corn, a reporter from Mother Jones magazine. On October 31, 2016, a week before the election, Mother Jones reported that a former intelligence officer, whom they did not name, had produced a report based on Russian sources and turned it over to the FBI.[46] The article disclosed some of the dossier's allegations:
The first memo, based on the former intelligence officer's conversations with Russian sources, noted, "Russian regime has been cultivating, supporting and assisting TRUMP for at least 5 years. Aim, endorsed by PUTIN, has been to encourage splits and divisions in western alliance". It maintained that Trump "and his inner circle have accepted a regular flow of intelligence from the Kremlin, including on his Democratic and other political rivals". It claimed that Russian intelligence had "compromised" Trump during his visits to Moscow and could "blackmail him". It also reported that Russian intelligence had compiled a dossier on Hillary Clinton based on "bugged conversations she had on various visits to Russia and intercepted phone calls."
— David Corn, "A Veteran Spy Has Given the FBI Information Alleging a Russian Operation to Cultivate Donald Trump", Mother Jones (October 31, 2016)[46]
https://en.wikipedia.org/wiki/Trump%E2%80%93Russia_dossier#Mother_Jones_story