Poll expert explains the limits of polls August 9, 2015 · Leave a Comment Lee Miringoff, director of the Marist Institute of Public Opinion, describes why he’s wary of TV networks using polls to determine debate invitations. Reliable Sources, CNN Share:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to email a link to a friend (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)MoreClick to print (Opens in new window)