When they are a kind of “contract support security” organization, no issues. But if they have morphed into an offensive organization for direct combat, that’s wildly unconstitutional and an uncontrolled entity.
Syria comes to mind immediately here. It would be no surprise at all to learn the CIA had been conducting offensive ops without WH approval there.
I suspect a whole lot lies happened with Syria.
Lying to POTUS about Syria is disgusting
I might understand it if it was in the plausible deniability to protect POTUS category
but I doubt that is what it was