Nate Cohn explains how to fix political polling

<p>It's full throttle onto November with all primaries now in the rearview mirror, which means pollsters are putting out their data in early hints of where both parties will stand at the outcome of the elections. Nate Cohn, chief political analyst for the New York Times, joins Chuck to detail the science behind the tracking of public opinion... and why not all polls are created equal.</p>