"Legal restrictions are preventing political pollsters from reaching millions of Americans this election cycle because they rely exclusively on cell phones," The Hill reports.
"The inability to reach such voters, mainly young people, is contributing to the growing perception that phone surveys are skewed and inaccurate and should become a thing of the past."
Mystery Pollster investigates the impact on the latest polls. Earlier, we ran an email from pollster John Zogby that claimed the use of cell phones was a growing issue, but defended the reliability of telephone polling.