Like other witnesses, he is likely facing questions about whether he ever found President Clinton alone with Lewinsky.
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Instead, Breuer made another appearance before a federal judge in a closed-door hearing. It's the same courtroom where he appeared Tuesday after reportedly refusing to answer some questions before the grand jury.
The subject of the hearing was not known, but it may be part of a White House attempt to build a record for a case on attorney-client privilege. The White House wants the full Supreme Court to take up the issue this fall.
Meanwhile, Reuters is reporting that Lewinsky is "99 percent certain" to testify Thursday before the grand jury. It based its report on a source familiar with the case.