Loading the player...

# Use Youtube player (with Youtube AD) #<<<>>> # Use our player (Downlaod, Unblock & No Youtube AD) 再生できないときはここをクリック　click hrer if failed to load 如无法播放请点击这里#

INFO:
At their best, polls can empower the broader public to help influence crucial decisions. But it is important to recognize the limitations, in addition to the strengths. Here's a guide.
What polling does — and doesn’t — tell us | PBS News