  We review some of the reasons for believing that the generic core-collapse
supernova is neutrino-driven, not MHD-jet driven. We include a discussion of
the possible role of rotation in supernova blast energetics and morphology, and
speculate on the origin of Cas A's and SN1987A's ejecta fields. Two "explosive"
phenomena may be associated with most core collapses, the neutrino-driven
supernova itself and an underenergetic jet-like ejection that follows. The
latter may be a magnetic wind that easily penetrates the debris created by the
much more energetic supernova. We predict that many core-collapse supernova
remnants should have sub-dominant jet-like features. In Cas A, we associate
this sub-dominant collimated wind with the "jet/counter-jet" structure
observed. We suggest that the actual Cas A explosion itself is at nearly right
angles to this jet, along a rotation axis that coincides with the bulk of the
ejecta, the iron lobes, and the putative direction of motion of the point
source. It may be that when rotation becomes sufficiently rapid that the
strong-neutrino-driven-supernova/weak-jet duality switches to a strong-MHD-jet
scenario that might be associated with hypernovae, and in some cases GRBs.
Finally, we present a calculation using a new 2D multi-group, flux-limited
radiation/hydrodynamics code we have recently developed for the simulation of
core-collapse supernovae. We discuss the rotation-induced anisotropy in the
neutrino radiation field, neutrino heating, and the neutrino flux vectors and
speculate on rotation's possible role in the supernova mechanism and in the
overall supernova phenomenon.
