I don't believe that this is accurate. As an earlier poster mentioned, the Supreme Court ruled in the last 24 months that the police could in fact demand that a citizen (or non-citizen for that matter) identify themselves.
I will look to find the court case. But, at the time, there was plenty of concern voiced by liberal and conservative libertarians about this ruling.
“As an earlier poster mentioned, the Supreme Court ruled in the last 24 months that the police could in fact demand that a citizen (or non-citizen for that matter) identify themselves.”
There is a difference between identifying yourself and being required to carry and ID.