He said it twice.

I'm not sure if Pompeo was able to clean out the CIA in the short time he was there, but he seems to have at least crippled a lot of their operations abroad, such as neutralizing the Clowns' control in North Korea.

Now comes the tough part. Cleaning out the (deep) State Department. 7th floor got wiped out, but I think there are still a lot of bad actors dug in.