The Big Money Business of Small Donors Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Republican presidential candidate Ben Carson speaks during the CNN Republican presidential debate on December 15, 2015 in Las Vegas, Nevada. ( Justin Sullivan / Getty ) Produced by Jillian Weinberger Hosted by Todd Zwillich Produced by PRI and WNYC