How reliable are political polls in an era when almost no one answers the phone? Pod Save America co-host Dan Pfeiffer tells Brian Stelter that he takes polls "seriously," if not literally, and says Democrats dismiss the data at their own peril. "We are living on the knife's edge," Pfeiffer says, with Donald Trump showing the "slightest of leads right now" over Joe Biden. Pfeiffer explains why he'd rather be the Biden campaign than the Trump campaign and gives tips about how to digest media coverage of the presidential campaign.