Chairman Chuck Grassley is accusing Fusion GPS founder Glenn Simpson of giving “extremely misleading” statements during August 2017 testimony to the Senate Judiciary Committee — and in doing so is comparing it to the false testimony that former Trump lawyer Michael Cohen also gave to Congress at the same time.

In a Monday letter to Sen. Richard Blumenthal, D-Conn., Grassley accuses Simpson — the co-founder of political research firm Fusion GPS — of giving “extremely misleading if not outright false testimony” when he gave a closed-door deposition on Aug. 22, 2017.