From the NYTimes:

[Democratic Staffer] Ms. Greenfeld, who as a young Justice Department lawyer helped prepare Justice Ginsburg for her confirmation hearings in 1993, likens the current situation to preparing for a dinner party without a guest list.
“You don’t know how many are coming, you don’t know what they are allergic to and you don’t even know if you are going to have a chance to go grocery shopping,” she said. “So you are trying to set the table, if you will, based on the facts of the history of what has gone on before.”