I agree with the consensus - too old. We’d just end up replacing him. Maybe a House seat? But it’d be fun, either way, while it lasted!
I think it would be great for him to run and win. He should get sworn in, and then resign. It would be the biggest be-ouch slap to the dems ever. This of course is all dependent on how AZ handles resignations—it needs to be a guaranteed conservative replacement.