Term limits. No more than the greater of two terms or ten years for any elected position. Forces there to be new faces, but does not discriminate against age cognitive tests should be required for all elected positions, at least at the state and federal levels, at least starting at whatever the medically accepted age where cognitive decline is more likely (or whatever the phrasing needs to be), and it needs to be yoked to whatever the medical science says, not a fixed age.
How you are registered is not always indicative of your beliefs or how you vote. I’d rather see what he has said on social media or things he’s written personally to figure out more about him. My friends and family don’t know how I’m registered or how I vote (not really), but they know my belief structure and I vote as true to that as I can, and I suspect that is the case for 99.99% of voters.