You're reading: CNN: Russia dossier firm founder speaks with Senate judiciary investigators

Glenn Simpson, the former journalist who helped compile the Russia dossier with allegations of collusion by President Donald Trump’s top aides, spoke with staff on the Senate Judiciary Committee August 22 for more than 10 hours.

Senate Judiciary Committee Chairman Chuck Grassley originally subpoenaed Simpson last month after Simpson refused to testify before the committee, but the Iowa Republican dropped the subpoena after Simpson agreed to speak privately with committee staff.