As I write this, the House Rules Committee hearing is creeping into a fifth hour. It has been an enlightening discussion on constitutional law with testimony from Elizabeth Price Foley, Jonathan Turley, Si Lazarus, and Walter Dellinger. Even though the hearing is still not over, the National Journal already has a summary (at least from hour 1).
You should download and read their testimony:
Elizabeth Price Foley (witness statement)
Jonathan Turley(witness statement)
Walter Dellinger (witness statement)
Simon Lazarus (witness statement)
The stamina to handle such a lengthy hearing with so many questions is remarkable.