Reply #1: Polls are commissioned by people with an agenda.

[TexasObserver]

Pollsters are businesses, and they have to sell themselves to the person or entity hiring them. They know the political bent of their employers, and that causes each poll to conform itself implicitly to those expectations.

In 2004, Scott Rasmussen found that out when he failed to give Bush the expected uptick after the Republican convention. They practically tarred and feathered him, and he immediately apologized profusely and "corrected" his error.

There is spin in virtually every poll being taken. They can twist the outcome merely by the time they poll and the method. If you want Hillary to do well, use only voters who voted last time, poll only on weekends, and do so only by land lines. You'll get a Hillary result every time simply following those three standards.