Justice Harry Blackmun’s papers have been released and they are quite revealing. Among other things, they note that Justice Kennedy originally voted to overturn Roe in the 1992 case Planned Parenthood v. Casey, but then had a change of heart. The New York Times, which got advance access to the papers before the release, reports on their contents here. SCOTUSBlog has more here (and will likely update with more on the subject).