Your Grandparents vs Your Grandparents.

[TNF]

Maternal Grandfather / Maternal Grandmother (D) - populist, working class union Democrats
Paternal Grandmother (R) / Paternal Grandfather (I) - working class Republicans

[TNF]

Maternal Grandfather / Maternal Grandmother (D) - populist, working class union Democrats
Paternal Grandmother (R) / Paternal Grandfather (I) - working class Republicans

Vermont/Connecticut/Massachusetts/California/Rhode Island/New York/Delaware/Maryland would literally vote for a democratic cat before they would vote republican, at least on the presidential level. Oklahoma/Arkansas/Tennessee/Alabama/Texas (at least for now)/Louisiana/Kentucky/West Virginia would literally vote for a republican cat before they would vote democratic, at least on the presidential level.

The candidates in question literally have the same views, so I don't think there's much of an issue with the map I presented. Every state would literally be a tossup.