The constant call of democratic 'higher ups' is to accept differences within the party. To move to the right. To accept even the most obviously right wing politician so long as he will wear the (D) tag.
However caller after caller to Cspan suggest he should leave. There is a deep anger you can hear in the words of the callers. Anger previously poo-pooed by democratic politicians and bluedog democrats. As one caller said "he's a good ol boy. He was in with Clinton and now Bush is in power and he's all over bush". This same caller cant stand Miller because.. of all things.. he destroyed trout fishing in Georgia. Another says if 'zig zag zell' doesnt want to be a democrat then let the republicans have him.. we dont need him.
In other words your seeing the beginnings of the Dean Revolution. Rank and file democrats no longer hold their tongue. Suggesting they not only no longer trust the counsel of the 'old guard' but just dont care.
Of course it is stunning that Cspan would let democrats talk.. much less only democrats. Even on an issue that is purely democratic. You may be sure that soon Cspan will have open lines and will be lambasted as an evil communist bastion. Not to worry dittoeheads. Cspan will be back to all bush all the time soon.