It has been suggested, here and elsewhere, that Fox News effectively became part of the Republican propaganda apparatus during the presidential campaign by giving pundit slots to many of the Republican candidates and relentlessly advocating for Mitt Romney once he won the nomination.

Over many months, Fox lulled its conservative base with agitprop: that President Obama was a clear failure, that a majority of Americans saw Mr. Romney as a good alternative in hard times, and that polls showing otherwise were politically motivated and not to be believed.

But on Tuesday night, the people in charge of Fox News were confronted with a stark choice after it became clear that Mr. Romney had fallen short: was Fox, first and foremost, a place for advocacy or a place for news?

In this moment, at least, Fox chose news.

By now, most of you have no doubt seen or read about the election-night stare-down between the anchors at Fox News and Karl Rove, who, apart from running a “super PAC” that aimed to defeat the president, also served as an on-air commentator. While news outlets love access to insiders, Mr. Rove’s two roles seemed to be in profound conflict after Fox’s decision desk projected that the president had won Ohio, all but guaranteeing him re-election. Mr. Rove said that the call was premature and that the decision desk was ignoring important data.