Just weeks prior to Donald Trump accepting the Republican presidential nomination, then-Trump campaign chairman, Paul Manafort, offered briefings to a Russian billionaire with ties to the Kremlin, according to the Washington Post.

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The offer was reportedly emailed to an intermediary intended for Oleg Deripaska, a Russian oligarch whom Manafort had worked with in the past, according to the post. There was no evidence that Deripaska received the message.

The emails are part of an ongoing investigation by Special Counsel Robert S. Mueller to determine if Trump associates coordinated with Russia during the 2016 election.

Paul Manafort (Photo by Chip Somodevilla/Getty Images)

Credit: Chip Somodevilla

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Credit: Chip Somodevilla