Bill Ackman says Visa has the power to force Pornhub to remove child pornography

Pershing Square CEO Bill Ackman and Laila Mickelwait, an activist and founder of Traffickinghub, join CNBC's Andrew Ross Sorkin on Squawk Box to discuss the child porn lawsuit facing Visa and MindGeek, the parent company of Pornhub. A district judge in California on Friday denied Visa's motion to be removed from the lawsuit.