Washington ? The White House may have to negotiate with former President Bill Clinton and a Senate committee to resolve potential confidentiality concerns about releasing files from Supreme Court nominee Elena Kagan’s past, a top official told a senator Tuesday.

White House Counsel Bob Bauer said a Clinton aide is reviewing Kagan’s files from her stint in his administration to see whether any of the 160,000-page trove of records held at the Clinton presidential library should be kept secret.

If Clinton decides there’s material there that should be kept confidential, Bauer told Sen. Jeff Sessions in a letter, the White House would work with his staff to “reach a mutually satisfactory accommodation” with the Senate Judiciary Committee.

Kagan’s confirmation hearing with the committee is scheduled for June 28.