It feels utterly bizarre to think of people regularly discussing politics with their grandparents. All I know about the political affiliations of my grandparents on my dad's side is that they were big Republicans a while back, with a few Need Nixon Now and WIN buttons scattered around their house. I have no idea what they think now. The only political stance my grandfather on my mom's side has ever mentioned is that the new eye doctor in town, that Randal guy, is a real nutter.
Well I never discuss politics with my grandparents but I could tell what their views were when my dad discusses it with my grandfather as he criticized Republicans a lot while my dad defended them.