Okay, I'm calling BS on this notion that packed rallies is a better indication of electoral success than polling data, and the notion that the polling data is skewed to the left. This was a theme when Romney bombed... huge crowds at rallies in states that he went on to lose. All the while the polling data suggesting he would lose...
Good summary here: http://hotair.com/archives/2016/08/04/trump-with-crowds-like-these-how-come-were-not-winning/