How exactly can Kanye West win the Democratic nomination?

[Attorney General, LGC Speaker, and Former PPT Dwarven Dragon]

He could somehow win black voters and urban white voters? But if you'd asked the same thing about Donald Trump in late 2012, what would any of us had said?

It all depends on context

So you are literally just saying "but Trump" and "blacks/Millennials", without addressing any of the counterpoints to that.

Also how does he win Iowa or New Hampshire that way?

Winning Iowa or New Hampshire isn't necessarily needed.

Hillary won IA by 4 "delegate-equivalents", but the media narrative was all about a bunch of coin tosses that may or may not have determined the winner, how much the state hated Hillary, how weak she was, and about how it was really a tie - so it doesn't really count as a win. She then proceeded to get squashed in New Hampshire. But no worry - she had the minority vote. NV gave her a mild scare because of negative momentum post-NH, but after that she was able to run through the south, winning by landslides across the region. Bernie never recovered.

Bill Clinton lost both IA and NH in the 1992 primaries. But no worry, he had the south behind him, and won the nomination that way.

My point: IA and NH are overrated in the democratic primaries.

[Attorney General, LGC Speaker, and Former PPT Dwarven Dragon]

And why would he win the Plains and Mountain States? And how would he win VA? Who in NOVA would vote for him?

Yeah, now that I think about it, here's a place in the south that he would not win. Fairfax/Alexandria/Arlington is almost 100% educated folks who would never vote for a rapper. He'd do better in the somewhat less educated Loudoun and Prince William, but wouldn't get a big margin there. Assuming the white areas vote for someone else, that leaves him to work out a victory out of Roanoke , Norfolk, Portsmouth, and Richmond/Henrico. He might come close with that, but probably not enough.

NC would be an underwhelming margin for Kanye just like it was for Hillary. But the rest of the south would vote for him in a big way provided he is the only black candidate running.