Hi,
I think there is a difference between political appointees and real intelligence people. You need to rid the agency of those politically motivated. The first place I would start would be lie detector tests. They can do them, I think it is part of the deal.
Second I would go to the NYT and IRS. Subpoena the clown who wrote about the Trump tax information that was leaked to him. Put him under oath, give him immunity if he reveals his source. If he refuses to do so, charge hime with contempt of court - the Susan McDougall suite is available for a couple years.
The IRS people who are leaking information should not only be fired, but also be prosecuted criminally, just like those who release classified intelligence material.
Regards,
5412