Unfortunately, this strategy is wrong, and the result is inferior leadership, polarization into camps and never-ending arguments. Instead, voters should be encouraged to vote based on the qualifications that matter: their intelligence, their rationality, their integrity, and their ability to judge character.

It's very hard to judge the character/intelligence/etc. in someone you know very well, it's impossible in people who you only know from TV interviews. If you think you can do this, the most likely explanation is that you're suffering from overconfidence bias.

Yes, you can attempt to use proxies like standardized tests, but

• there a lot of high IQ people with very wrong beliefs.
• these proxies are approximate at best and are not going to survive Goodhart's Law.