[See NewsBusters for more.] ABC, NBC and CBS immediately pounced on a tweet by Ruper Murdoch in which the Fox News chairman suggested that Ben Carson would be America’s first “real” black president. These same networks stayed silent this week after a major college professor smeared Carson as a “coon.” On Thursday, Good Morning America’s Amy Robach opened the program by blasting, “New overnight: Crossing the line? Billionaire Rupert Murdoch sparking a firestorm, saying Ben Carson would be America's first real black president.” Co-host George Stephanopoulos highlighted “that controversial comment by the billionaire behind Fox News.”