[For more, see NewsBusters.] ABC and NBC on Wednesday night and Thursday morning avoided a bleak new poll labeling Barack Obama the "worst president" since World War II. Only CBS This Morning on Thursday bothered to cover the story, allowing 21 seconds to the dour forecast. Guest co-host Anthony Mason explained, "Since World War II ended, 12 men have been President of the United States. A new Quinnipiac University poll puts President Obama on the bottom of that list." The journalist added, "Thirty three percent of Americans rate him as the worst President." Only 13 percent said Richard Nixon.