it will be a real “tell” if/when some of these crooked manipulative pollsters suddenly start turning toward a Trump victory in order to salvage some credibility for future business.
Polling is a business. People who would do far more despicable things would think not thing of faking up some numbers in an Excel spreadsheet and calling “poll results”.
Credibility and accuracy is not what some of the pollsters' clients want. For example, CNN, ABC, CBS...etc.