Appears to be a valid survey from a Prof Susan Grogan of St. Mary's College of MD. Phone numbers are supposedly selected at random from the election rolls.

Survey can also be taken on-line at mdsurvey.org.

HOWEVER, this is still a robo-call and I find that unacceptable. Allowing an independent survey like this, as opposed to a valid survey company, opens the way for any yahoo to claim to be exempted from the DNC list.