Joel Skousen stated 75%  in July 20, 2012:

“The dirty tricks boys in the FBI have incriminating files on about 75% of Congress. Only about a dozen Congressmen are both clean and willing to fight the system.”

Joel Skousen: 75% in Congress are Blackmailable, while only about a dozen congressmen are both clean and willing to fight the system

October 13, 2021 update — 80%:

“The infiltration took place clear back in the Reagan administration when I was in Washington D.C.. They are firmly established now. Literally, they run the show now. We’re talking 80% of all the top level people in government are globalist or deep state lackeys. Especially in the Biden administration. It’s just swarming. There are no good people in the Biden administration. They’re all on the other side.” – Joel Skousen at 9:00 from:

The Jeff Rense Program, 10-13-21, Hour 2 – Joel Skousen – China Threatening Taiwan – All Talk?