They must do this because they need full access to the Media for their smear campaign against Roberts. Katrina will dilute their message and make it extremely challenging to get enough sheeple and activists fired up to give them cover while they make up ridiculous charges and work like hell to keep him off the court or at least seriously damage his credibility with the American People.
Great point that the liberals want to delay hearings until the media can focus on being their bitch.