I've had that happen as a canvasser. A lot of people have so many issues they're concerned about that they can't articulate them.
I sometimes half-jokingly ask them if it would take less time to tell me what they're NOT concerned about.
@ChelseaGirl429 @DrFaustus
I tell them "climate change," and it's not one of the choices on their lists. WTF, DNC??
@ChelseaGirl429 @DrFaustus
Good, because I definitely told them.