In this file photo taken on March 23, 2018 actress/executive producer Roseanne Barr attends The Roseanne Series Premiere at Walt Disney Studios in Burbank, California. US television network ABC on Tuesday, May 29, 2018 canceled the hit working-class comedy "Roseanne," after its star Roseanne Barr aimed a racist tweet at a former advisor to Barack Obama. The 65-year-old sitcom actress -- a vocal supporter of President Donald Trump who has used Twitter to voice far-right and conspiracy theorist vi