The attempt to do so only shows in my mind that one's candidate is not as strong as they pretend. Polls are a snapshot in time, just one and only tell part of a story, and this poll is just another element to look at. They certainly do not tell you who will be the eventual nominee, as historical data shows. This poll doesn't mean Warren will be the nominee any more than ones showing Biden ahead mean he will win. But they seem to be useful here for some in trying to declare the race over before voting even begins.