Did Melania's speech take Trump campaign off message?
The latest CBS News/New York Times poll found 69 percent of Americans don't know enough about Melania Trump to have an opinion, or are undecided. CBS News political director and "Face the Nation" moderator John Dickerson joins "CBS This Morning" to discuss accusations that Melania Trump's speech Monday at the Republican convention plagiarized part of Michelle Obama's 2008 speech.