I think Bernie was close to winning a bit more. The thing is that sequential battles mean that there is a high path dependency. Leftists and mainstream think as is the result was clear when the numbers are proportional very skewed in the end, however it is important to understand in which way effects of previous influence the late events.

This means you have to make lists, see who lives where who might vote and what their self engagement potential is. Same for organizing, you have to have people themselves do their work, but also make sure you will get to everyone who matters for the campaign.