[heurist]

In Clinton years, conservatives called CNN the Clinton News Network. If that's the objective period you're talking about then all you need to do is look at how "liberal media" is discussed today and draw the parallels.

The overton window has been shifting decidedly to the right since Reagan. Conservatives today have essentially all the power in this country outside of a few states, largely due to bombastic right-wing media like Fox, Rush, Sinclair, and now Breitbart. If other mainstream outlets are shifting left it is to broaden their market share in response to competition.

The country is now realizing that some bad things resulted from that and the majority of the population in this country are moderate-left, so the window seems to be moving leftward again. I imagine it will continue bouncing back and forth over the course of decades. The citizens of the US all want to maximize power/freedom for themselves. Sometimes liberal policies are the way to do that and sometimes conservative policies are the way to do that.