Bernie Sanders, to put this another way, doesn't need a focus group or a poll to tell him what he ought to stand for. He already knows what he stands for, and he'll freely tell you exactly what that is.
Even though it's been over a decade ago, I vividly recall my shock when sitting in a committee meeting for a non-profit. The chair asked us each to report back on the task we agreed to do. The second told us that she hadn't started on her assignment.