May 2019
According to a new national poll conducted by the American Bar Association, less than half of the U.S. public knows that John Roberts is chief justice of the U.S. Supreme Court, while almost one-quarter think it is Ruth Bader Ginsburg and 16 percent believe it is Clarence Thomas.
The nationally representative poll of 1,000 members of the American public found troubling gaps in their knowledge of American history and government, as well as constitutional rights. One in 10 think the Declaration of Independence freed slaves in the Confederate states and almost 1 in 5 believe the first 10 amendments of the U.S. Constitution are called the Declaration of Independence instead of the Bill of Rights.
https://www.americanbar.org/news/abanews/publications/youraba/2019/may-2019/aba-survey-of-civic-knowledge-shows-some-confusion-amid-the-awar/