Every legislator who values the constitutional role assigned to the branch they joined ought to be rallying together as one against Langley's intransigence, even if the version of events friendliest to the CIA turns out to be accurate.

The short version:

While writing its torture report, senators and their staffers were forced by the CIA to work in a secure room in Virginia, rather than a secure room at the Senate, which added significant time and expense to their oversight work.

Senate staffers working in that CIA room, inside a database of documents provided by the CIA, discovered information about torture generated within the agency that contradicted its official statements to the U.S. Senate.

Senate staffers took what they insist is proof of the discrepancy.

The CIA maintains that the staffers were not allowed to access or remove that information, and argued that the Senate staffers should be investigated.

Senate staffers say the CIA only knew the documents were taken because it spied on its overseers as they were drawing up the report.

Every senator ought to be up in arms. Even the members of Congress most trusting of and deferential to the national security state, folks like Representatives Peter King and Mike Rogers, ought to have their legislative colleagues' backs, if only to preserve the ability of the legislature to fulfill one of its vital roles.

Instead, the chain of legislative solidarity has weak links everywhere.

As a result, the CIA gambled that it could can spy on, antagonize, and obstruct its overseers, denying them relevant documents and even trying to get them in legal trouble for doing their jobs. The fact that the CIA believes this might work is problematic. It shows how backward the relationship between agency and overseer has become. Not that this should surprise us. Give someone an inch and they take a mile. Let them get away with illegal torture and what did we expect?

Americans may get lucky. The inspector general of the CIA has referred the spying allegations to Justice Department to investigate. The legislative branch should conduct its own probe. And if it's been jerked around in any way, the CIA should pay a price.

As Ed Morrissey writes, "This is among the worst possible accusations that could be levied against an intelligence service in a constitutional republic. For the CIA, it would be doubly worse, since the CIA’s charter forbids it to conduct any kind of domestic intelligence; that jurisdiction belongs to the FBI, and it’s significantly limited. The legislature oversees CIA, not the other way around, and if the CIA is snooping on their oversight work, that would undermine their authority."

Why doesn't every last member of Congress see that?