But not the “Crossfire” of 2004. CNN overreacted to Jon Stewart’s jeremiad, but he wasn’t entirely wrong. The show was years removed from its Michael Kinsley/Pat Buchanan glory days, and its liberal hosts at the time, Begala and James Carville, really were Democratic Party hacks. (The conservatives, Carlson and Robert Novak, were much more independent-minded, but the constant need to rebut partisan talking points took its toll on them as well.)

What cable news needs, instead, is something more like what Stewart himself has been doing on “The Daily Show.” Instead of bringing in the strategists, consultants and professional outrage artists who predominate on other networks, he ushers conservative commentators into his studio for conversations that are lengthy, respectful and often riveting. Stewart’s series of debates on torture and interrogation policy, in particular  featuring John Yoo and Marc Thiessen, among others  have been more substantive than anything on Fox or MSNBC.

Even the thrust-and-parry sessions of “The Daily Show,” though, are limited by the left-right binary that divides and dulls our politics. They’re better than the competition, but they don’t give free rein to eccentricity and unpredictability, or generate arguments that finish somewhere wildly different than where you’d expect them to end up. This is what you find in the riveting television debates of the past: William F. Buckley versus Gore Vidal, Vidal versus Norman Mailer, anything involving Ross Perot. And it’s what you get from the mad, compulsively watchable Glenn Beck, who’s an extremist without being a knee-jerk partisan: You know he’s way out there on the right somewhere, but you don’t know what he’s going to say next.

Stewart, Buckley, Beck ... none of these are exactly the models that you’d expect “the most trusted name in news” to look to for inspiration. And some CNN suits have probably never even heard of Gore Vidal.

But television is a business. And when you’re losing to re-runs, you’ve got nothing to lose.