You said crossing the streams was bad!
The only way MSNBC maintains a state of dynamic schizophrenic equilibrium between its Liberal-ish evening lineup and it's three-hour Republican/Beltway Morning Frottage Extravaganza with Squint and the Meat Puppet by having lots of rules.
And Rule One is very clearly that Thou Shall Stick To Thy Own Knitting; everybody gets to sit under their own vine and fig tree, and none of their colleagues shall make them afraid.
I mean, given her line of country, in any sane world, Doctor Maddow would spend at least 20 minutes a night, every night, laying waste to the likes of Joe Scarborough --
-- pounding Chuck Todd into the ground like a tent peg and using David Gregory's guts for garters. But she does not.
Nor does Lawrence O'Donnell.
Nor does Chris Hayes.
Because those are the rules: each of the network's dissociative identities remains functional by pretending The Other does not exist.
But Ms. Wallace has crossed the streams.
I wonder what happens now?