“Voter rolls are public, and the Democratic Party has long been aggregating additional information about voters to aid with fundraising and turnout operations, data that all major campaigns have access to. The difference is that the Sanders app democratizes the process with the goal of expanding the electorate, while the party operations are aimed at identifying existing supporters so they can be motivated to vote. The party data is generally available to campaign volunteers, but because Sanders lowers the bar to volunteering, more people will now have access to the data. The goal, though, is to get more people to vote for Sanders, not to attack Sanders opponents.”
from Tacoma DSA http://bit.ly/2IQJhOo