Former Vice President Joe Biden mentioned the “Logan Act” during an early January 2017 Oval Office discussion about the investigation into retired Lt. Gen. Michael Flynn, newly released notes suggest.

It’s not fully clear what Biden said about the 1799 law, but Flynn’s legal team said “it appears” he “personally raised the idea” during a meeting between former President Barack Obama, then-FBI Director James Comey, national security adviser Susan Rice, and Deputy Attorney General Sally Yates in the days leading up to President Trump’s inauguration. Biden is now the presumptive Democratic presidential nominee and leading in national polling.