In Politico, Josh Gerstein reports that the White House may release an OLC memo today.

It’s possible the White House will release a formal Justice Department Office of Legal Counsel opinion early Thursday setting forth a detailed legal justification for Obama’s actions, a person familiar with the situation said.

This is a good call, and something I’ve been asking about now for a few days. I would such a memo cites not only the past precedents of what other Presidents have done, but what are the limits of this authority, and whether it applies to other aspects of prosecutorial discretion.