The CIA should be completely abolished. Unlike the FBI, it does not seek to enforce any laws whatsoever; instead, they operate with absolutely zero oversight, there only rule being that they're not supposed to be involved in domestic matters. I wouldn't be surprised if they tag-team with other friendly agencies like MI6 to spy on each other's domestic targets so as not to violate that rule.
I have been reading Tim Weiner's excellent "Legacy of Ashes", a history of the CIA. Everyone should read it; it won a national book award and is generally well-researched and sourced. What it indicates is that the CIA is essentially a long-running unconstitutional operation, and that every president since WWII has made use of the CIA to conduct covert actions in foreign countries that are entirely illegal, including…
The CIA essentially operates outside the framework of all laws and doesn't have any sort of international standards. Even war--legalized killing--has the Geneva Conventions, laws of war, etc. The CIA just does whatever it wants, almost always violating the laws and sovereignty of a foreign country while doing so, with no public, legislative approval. What the military is doing in the middle east is secretive and abusive but there is, however broad, an AUMF on the public record saying why we're there. If a solider gets captured in a foreign country, we don't just pretend we didn't send them there. The CIA can just deny that it even operates there forever. That's what I mean by no oversight.