MSNBC host Lawrence O’Donnell reported news Tuesday night that, if it proves to be true, could have a significant impact on current presidency of Donald Trump and Congressional investigations into Trump’s finances and his possibly compromised relationship with Russia.

O’Donnell reported that, according to a single source, Russian oligarchs co-signed a loan provided to Trump by the Deutsche Bank. O’Donnell first revealed this news during Tuesday night’s handoff from Rachel Maddow to his show, in which he shared this potential bombshell.

O’Donnell said to his MSNBC cohort “this single source close to Deutsche Bank has told me that the Trump — Donald Trump’s loan documents there show that he has co-signers. That’s how he was able to obtain those loans. And that the co-signers are Russian oligarchs.”

A shocked Maddow replied, “What? Really?”

He then followed with “That would explain, it seems to me, every kind word Donald Trump has ever said about Russia and Vladimir Putin, if true, and I stress the if true part of this.”

UPDATE – 12:31 pm ET: NBC News has not verified the reporting.

Deutsche Bank is declining to comment on Lawrence O’Donnell’s reporting that Russian oligarch’s co-signed Trump’s loans. The information came from a single source who has not seen the bank records. NBC has not seen those records and has not yet been able to verify the reporting. — Michael Del Moro (@MikeDelMoro) August 28, 2019

UPDATE — 4:07 pm ET: O’Donnell has now admitted to an “error in judgment” in reporting on it in the first place.

Watch above via MSNBC.

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