This is a skewed poll. Per The Conservative Treehouse who examined the internals:
"Yes, that’s correct. As unbelievable as it might sound, they used a D+34 Sample. ◾Republicans represented 24% of those polled. ◾Democrats represented 58% of those polled. ◾Independents represented 19% of those polled. In order to get the poll to show Hillary Clinton with a 5 point lead, they needed to survey more than twice as many Democrats as Republicans"
https://theconservativetreehouse.com/2016/10/19/about-that-pro-clinton-arizona-polling-narrative/