If you were a real C-SPAN watcher you'd know that that is not their job.
But it IS their job to cut off a caller because he calls Jimmuh........Carter "the worst President ever." That's unacceptable, but callign Bush a liar and other over-the-line things is tolerated? And tehy have no bias, right? Just like CNCBS and PMSNBC (More Socialist Nonsense By Creeps.)
There must have been more to it than calling Carter the worst president ever.