That would work on Fox, but can you see Tim Russert, Cokie Roberts, or George Stephanopolis allowing that to happen on their shows?
The problem here is that Republicans are not as scripted as dems. Trying to feed a Republican talking points -- and expecting him to repeat that and only that -- is a real tough sell. They have a tendency to credit the public with more intelligence than the public actually has -- witness the House Managers trying to explain impeachment (it's not about sex, it's about treason). These guys can tick off point-by-point why Clinton should have been in jail, the the public (and the talk show hosts) get that MEGO (My Eyes Glaze Over) look and all they hear is Carville shreiking, "Theys attakin' maaaah prezadint!"
Republican Congressional staffers live with the constant frustration of having to defend their bosses every time the Congressman tells the truth about the dems. They're constantly fending off attacks and charges of Bigotry! Racism! and Homophobia! That leaves them little time for the actual business of legislating. Eight years of Clinton and the mediawhores have taught them they get a lot more done if they just let the dems shoot themselves in the foot.
That's where we come in. It's our job to get these stories out. The dems can't attack all of us, not all at once. And the media is slowly losing its grip. We're the ones who need to keep the drumbeat going. The dems look stupid when they're caught in their lies, but we're the ones who have to catch them and howl loud and long about it. For Republican Congressmen to try to rein in the moderates and fight the media is asking them to be superhuman. They fight when they can, but they need our support.