Landline users are very different from mobile users

The politics of this is immaterial to us at the Interchange Project, but the findings are fascinating:

Political pollsters have been under pressure to make sure their samples include Americans who rely solely on cell phones—and the latest NBC News/Marist polls of Florida, Ohio and Virginia exhibit why.

As NBC’s First Read flags, Romney narrowly pulls ahead in Florida among voters who were polled over landlines—48 percent to 45 percent. But among cell phone respondents only, Obama has a major lead: 57 percent to 34 percent.