I have a long post over at Lawfare on the briefing in Carpenter v. United States. The post begins:

The Supreme Court will hear argument on Nov. 29th in Carpenter v. United States, a case on whether the Fourth Amendment applies to government collection of historical cell-site records. I wrote an amicus brief in the case that explains many of my views on it. I have four additional thoughts on the briefing, however, so I figured I would offer them here.

You can read the rest of the post at Lawfare.