MSNBC's first national map night without past fixture Steve Kornacki looked, for a moment, like it might spook MSNBC's most hardcore partisans, but by the time the returns were rolling, a different verdict emerged and his replacement, journalist Ali Velshi, became the nothing short of a beloved hero. The channel, soon to rebrand as MS NOW on November 15 parent as Comcast spins off into a new unit called Versant, has been aggressively insisting the split won't change the core of what it does,