The Obama administration, which would seem to have its hands full with a two-front war in Iraq and Afghanistan, opened up a third front last week, this time with Fox News.

Until this point, the conflict had been mostly a one-sided affair, with Fox News hosts promoting tax day “tea parties” that focused protest on the new president, and more recently bringing down the presidential adviser Van Jones through rugged coverage that caught the administration, and other news organizations, off guard. During the health care debate, Fox News has put a megaphone to opponents, some of whom have advanced far-fetched theories about the impact of reform. And even farther out on the edge, the network’s most visible star of the moment, Glenn Beck, has said...