Dissenters against the Iran line

This article doesn't make clear the depth, breadth, or motivation of the skepticism over the level of Iranian involvement in Iraq, but it's quite interesting that it's there.

Yet some sources indicate that elements inside the U.S. government -- in the U.S. intelligence community, in particular -- are trying to head off a possible administration move to escalate the confrontation with Iran over its suspected actions in Iraq. Some officials reportedly have doubts about the precise nature of the evidence indicating Iranian involvement in Iraq. ...

Contrary to some initial reports that American troops had found damning maps and documents on the detained Iranians, some U.S. government sources indicate that the Hakim raid did not produce definitive proof of Iranian involvement in supplying Iraqi militants. "They are trying to walk this back," one U.S. official said. "There are no smoking guns about Iran in Iraq," said another knowledgeable U.S. source. "That's the problem. Sort of like the WMD."

(The article broadly points to the idea that Iranian interference in Iraq is now being emphasized because rgional powers weren't acting on the adminitration's emphasis of a nuclear threat.)