In the US, a vast majority of people vote by party. They may not even know the candidates by name, and simply vote “straight ticket.”

But I was in line to vote a few years ago and overheard someone say something like “yeah I saw more signs for This Guy than for That Guy, so I guess I’ll vote This Guy.”

I have also heard it’s not uncommon for Americans to vote for candidates they think are more attractive, or have a name they like more.

Basically, we’re pathologically stupid