With yesterday's defeat of Joe Lieberman in the Connecticut Democrat primary and Cynthia "Cop Popper" McKinney's loss in the Georgia runoff, the Democrat Party shows what kinds of insanity it will tolerate. From National Review Online:

I guess tonight's lesson is that you can be politically and ideologically insane and be a Dem candidate (Lamont) but not be personally insane (McKinney).

Yep, that about sums it up.