Nichter said in a telephone interview Friday that Lamberth's order unsealing the records is exciting, but he doesn't know whether they'll provide any major Watergate revelations.
"One of the things about being a historian is you're always filling in gaps in your knowledge," he said, adding there "are still so many unanswered questions about Watergate."
Lamberth has unsealed Watergate documents before. In 2011 he ordered that a secret transcript of Nixon's testimony to a grand jury about the Watergate break-in be made public.
Jessica Gresko can be reached at http://twitter.com/jessicagresko