Although the Supreme Court feels some pressure for consistency via precedent, it doesn’t seem to strive at all for consistency in interpretive approach. Thus, the Court’s opinions are all over the map when it comes to the method of constitutional interpretation. Sometimes the Court reads the Constitution broadly and dynamically; sometimes it interprets the Constitution narrowly; sometimes it becomes a textualist; sometimes it becomes obsessed with original intent. And all this can happen in the same year!
When it comes to interpreting the Constitution, the Court will pay attention to precedent as to the substantive meaning of a constitutional provision, but it will often repeatedly shift around in its interpretive method. There seems to be little attempt to develop a precedent for the appropriate method of constitutional interpretation. Institutionally, why does the Court strive for consistency with regard to substance but not consistency with regard to method?