The rationale of the White House offensive against Fox News has been a topic of much puzzlement lately. Is this just the White House lashing out? Are they trying to rally the base?

But I think Mike Allen and Josh Gerstein nail the real explanation in their story today: The White House is working to prevent stories born on Fox from crossing over into more widely-viewed media. Most Americans still haven’t heard of Van Jones, for instance; and the strategy is now all about containment…