if you have to accept the inevitability of a decrease in black turnout in the post-obama era, and the numbers are in, now - you do - then you're going to need to find some other way to win.

i wish that sanders was winning large numbers of latin voters in states that matter, more.

but, i'd consider the possibility of winning arizona on the back of strong latin-speaking support to be much higher than the possibility of getting black turnout up in milwaukee. if you want to win wisconsin back, you have to grapple with the actual demographics - this trump card of 99% black support across the board for the black candidate is over.