Are african Americans not minorities? Romney won the white vote in almost every state outside of Washington Oregon Iowa and New England. And maybe Delaware. Democrats are absolutely dependent on minority voters to push them over the top.
Yes. Obviously Democrats do need some votes from minorities to win, in particular from African Americans.
The point is that many fewer votes from minorities are needed than one would probably presume. So much so that with drastically reduced minority turnout (including ZERO Hispanic turnout and ZERO Asian turnout), Hillary could lose the popular vote by several points and still win the electoral college. That's the central point. It seems surprising to me, but that's what the demographics and the numbers are.
Back when the electoral college was a good thing!