Paul Manafort will meet with Senate investigators in the next 48 hours and has agreed to provide notes of the meeting at Trump Tower last year with a Russian lawyer, according to a person close to the investigation.

This person said Manafort would answer questions about the June 9, 2016, meeting, which was precipitated by the attorney, Natalia Veselnitskaya, offering to help Donald Trump’s campaign by providing dirt on Clinton. Manafort, who was Trump’s campaign chairman at the time, will also provide contemporaneous notes of the session, this person said.