I found these to be a good read, and an explaination of the how's and why's of public polling. Notice the dates for each.
Why Public Opinion Polls Are Increasingly Inaccurate | The Report | US News
Articles: Opinion Polls or Propaganda?
I am not presenting these here because of my known party affiliation, but as an American curious about the state of Polling in America today. All mention how difficult it is just to get people to participate, and even point out why that may be..
So stop the politics for a moment and consider if you care to.