National Public Radio

On June 5, California holds its congressional primaries and in one largely rural district, there is a new kind of money entering politics: payments to Facebook, where messages can be sharply targeted and it's cheaper to advertise than on radio, TV or newspapers. In CA's 4th Congressional District, one political novice bought his way into relevance using the social network, and has helped shape a hotly contested Democratic race, stirring up animosity in the process.