Senate Judiciary Committee Chairman Chuck Grassley and ranking member Dianne Feinstein said Thursday that Jared Kusnher was not forthcoming to the committee about his communications with WikiLeaks and Russia.

According to Grassley, an Iowa Republican, and Feinstein, a California Democrat, sent a letter to Kushner’s attorney saying President Trump’s son-in-law and adviser received and forwarded emails about WikiLeaks during the presidential campaign in 2016, but Kushner has kept those documents from their committee’s investigators.