Judge Roberts - Confirmation
Here's the problem. Cases coming before the court are controversial/current cases. This is what politicians want to know about. Whether correct or not, current judges state that answering those questions regarding these cases would damage their own ability to make those decisions in the future (as well as making themselves available for any and every litmus test). In other words, judges can only talk to politicians (in the confirmation process) about things the politicians don't care about.