Here's another way to look at it, geographically-
Note that Nevada has been turned around, and declared a victory for Sanders, due to 'phase 2' of its caucus process, involving county-wide meetings. I don't fully understand the process, but it's resulted in 2 more delegates being awarded to Sanders, and the whole state declared a win for him. Iowa, Missouri, and Massachusetts are shown as 'ties,' because the voting results there were within less than 1% difference for each candidate. Also, on both maps, if Alaska and Hawaii were placed in their proper positions, and shown to scale, it would visually show Sanders' support to have a strong lean toward the west.
It should be kept in mind too that a significant amount of Clinton's wins occurred in the early stages of voting, when Sanders had almost no name-recognition, thanks to the media blackout of his campaign. Hardly anyone knew he was running. Now that he's getting more and more attention, and people are learning who he is, and about his platform, I think early voting trends are not reliable to indicate what may come.
To understand the United States geographically, you should know the whole west coast, including Washington, Oregon and California, is isolated from the rest of the country by a high mountain range, almost as if those three states exist on another continent. California is next door to Nevada, but they are completely different. California is densely populated, with fertile terrain, and a rich diversity of agriculture and industry, whereas Nevada (mostly desert) is sparsely populated, whose main income is from the operation of casinos and hotels. 3/4 of the state's population lives in a single county, near Las Vegas. California may be in proximity to Arizona and Nevada, but that doesn't mean it will vote as they voted. New York remains an enigma for me. Clinton adopted the state as her home, and represented it in the Congress, but Sanders is its native son. I think the debate to be held there next week in Brooklyn will have a lot of influence over what happens there, more so than voting results in other primaries or caucuses.
Of course, he needs to do the same in New York and California, which seems unlikely at the moment. But now Sanders definitely has got momentum, so I think this nomination will be a bit less predictable and boring than we thought for a while.
