I mean, to a degree, polling in general is still conducted with a very antiquated structure that tends to bring in responses predominately from the underemployed, undereducated and elderly (so huge cross section of enthusiastic trump voters over represented in those groups). But my specific point here was that he’s ambiguously citing “polls” and not a specific poll - They aren’t all created equal and in fact, you can bet the ones that trump would proudly reference are typically biased as fuck in how they ask questions and analyze results.