(BY PURE COINCIDENCE, the former Archivist resigned among a scandal in DEC 2008, just after Obama was elected, and just before he took office. This scandal was not revealed until DEC 2017, after Obama was out of office. The current Archivist has not allowed the release of any Obama records. Hmmm.)
Appoint a new Archivist, make one simple records request (like college transcripts), and ignore the Obama objection (since nothing of National Security importance could be found in a college transcript, right?)... and viola!!!