nero wrote:
So everyone at legal age can vote in North Dakota.
Well higher turnout than in average US.
Still very low. What is the reason?
Think about it.
Nothing to do with the election system?

Now you are
moving the goalposts Nero.
I thought that your issue was the voter registration system in the US and claiming that poor voter registration laws are to blame for low voter turnout.
So I give you an example of a state that has no voter registration requirements and the voter turnout is still relatively low (slightly better than the country as a whole but not significantly better), and now you want to change the subject by discussing the election system as a whole.
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Many people in the US are interested in our government, who is elected, who makes the laws, etc.
Those people will generally follow politics, and they will make the effort to go out and register, and then also to vote.
On the other hand, some people simply don't give a shit about who is running the country (for a variety of reasons).
They choose not to follow politics, they don't make the effort to register, or then even if they do register, they still do not go out and vote.