How an Antiabortion Group Used Cellphone Data to Send Targeted Ads

Until last year, an antiabortion group was using location data gathered from cellphones to send people who visited Planned Parenthood targeted advertising. WSJ reporter Byron Tau joins host Zoe Thomas to explain how the group got the information, the legality of these steps, and more about the group behind the effort. Learn more about your ad choices. Visit megaphone.fm/adchoices