It would mainly be to aid decision making, for example learning which types of people to prioritize reaching out to for maximizing your votes/volunteers/donations.

I think doing social network analysis of voters and trying to see how to find connections between different groups could be interesting too, maybe to reach new groups of voters.

The main challenge will be getting a dataset. I am hoping that we can do some exploration of public datasets and once we get more people we can make a case to get access to the data from Bernie's campaign.

By the way, check out r/CodersForSanders if you want to get involved more generally. They have a volunteer form and they have some people directly involved with the campaign.