That would be an interesting way to rig an election, although Google* would have to know who you were planning to vote for before stopping or allowing you through. Maybe separate pages? or tracking which link the person came from like the candidates campaign emails.
*absolutely not saying Google is actually doing anything like this, but it's an interesting thought
I don't think Google is trying to actively rig anything here, but I'm sure they can very accurately predict who you're planning to vote for.
This rather sounds like what people have been finding out the hard way recently though: Recaptcha is broken and everybody relying on it is a terrible idea.
*absolutely not saying Google is actually doing anything like this, but it's an interesting thought