Political spending is at an all-time high. Campaigns will spend almost $10 billion this year on advertising, according to AdImpact.But what are the rules? And in a world where every digital step we take is tracked, how much should we care? We get into who's behind this spending and how far down the ballot it goes.This conversation is part of our Remaking America collaboration with six public radio stations around the country. The series explores Americans' trust in institutions and the health of our democracy. Remaking America is funded in part by the Corporation for Public Broadcasting. Want to support 1A? Give to your local public radio station and subscribe to this podcast. Have questions? Find us on Twitter @1A.