Sabrina Eaton

Candidates this season keep calling each other extremists, Lisa.

Are they extremists? Do they even know what that means? What did reporter Sabrina Eaton learn when she explored the use of this word?

So Sabrina talked to University of Dayton sociologist Arthur Jipson, and she basically posed the questions, are there extremists in either or both parties? Well, Jipson says, you know, both parties have people at the margins.

What really matters is how their views influence mainstream politics.