Attacking the news media is a time-honored White House tactic but to an unusual degree, the Obama administration has narrowed its sights to one specific organization, the Fox News Channel, calling it, in essence, part of the political opposition.

“We’re going to treat them the way we would treat an opponent,” said Anita Dunn, the White House communications director, in a telephone interview on Sunday. “As they are undertaking a war against Barack Obama and the White House, we don’t need to pretend that this is the way that legitimate news organizations behave.”

Her comments are only the latest in the volatile exchange between the administration and the top-rated network, which is owned by the News Corporation, controlled by Rupert Murdoch. Last month, Roger Ailes, the chairman of Fox News, and David Axelrod, a senior adviser to President Obama, met for coffee in New York, in what Politico, which last week broke that news, labeled a “Fox summit.”

While neither party has said what was discussed, some have speculated that a truce, or at least an adjustment in tone, was at issue. (Mr. Ailes and Mr. Obama reportedly reached a temporary accord after a meeting in mid-2008.) But shots are still being fired, which animates the idea that both sides see benefits in the feud.