Why ABC moved quickly to cancel ‘Roseanne’

ABC canceled rebooted sitcom "Roseanne" on Tuesday over an offensive outburst by its creator and star. Roseanne Barr wrote a racist tweet about Valerie Jarrett, a former senior advisor to President Obama. William Brangham talks with Eric Deggans of NPR about ABC parting ways with what had become one of its most successful shows.