EFF: “Data about potential voters—who they are, where they are, and how to reach them—is an extremely valuable commodity during an election year. And while the right to a secret ballot is a cornerstone of the democratic process, your personal information is gathered, used, and sold along the way. It’s not possible to fully shield yourself from all this data processing, but you can take steps to at least minimize and understand it.  Political campaigns use the same invasive tricks that behavioral ads do—pulling in data from a variety of sources online to create a profile—so they can target you. Your digital trail is a critical tool for campaigns, but the process starts in the real world, where longstanding techniques to collect data about you can be useful indicators of how you’ll vote. This starts with voter records.”