> A voter whose online posts indicate unwavering and exclusive support for Republican White House contender Jeb Bush, for example, shouldn't get online advertis

> A voter whose online posts indicate unwavering and exclusive support for Republican White House contender Jeb Bush, for example, shouldn't get online advertising for his rival Marco Rubio. Wait, why shouldn't he? If he only hears about one candidate, he doesn't have a chance to learn other views. Isn't this exactly what people are complaining about with personalized Google searches?