There’s definitely a cross section of highly biased and partisan supporters that could have swung either direction at some point in their life if they had hung out with different people.
I think the relevant questions are:
- "What are the mindsets they've actually absorbed over their lives?"
- "How do they evaluate evidence?"
- "How do they evaluate the competence and character of judicial and executive appointees?"
- "Whom do they rely on for expertise?"
- "How do they reason about the role of government?"
- "How do they design policies?"
- "How do they spot potential unintended consequences?"
- "How do they communicate with constituents?"
- "Whose perspectives do they believe it is important to consider?"
- "Whom do they consider key to re-election?"