First, It is impossible to have a closed primary where state law forbids partisan voter registration, like here in Michigan. If one disagrees, I recommend that one suggests a procedure by which a closed primary could be accomplished under such laws. Please... suggest one that does not suppress the vote.

I will stand by my opinion that all primary elections should be open. The reason is that those states without partisan voter registration must have open primaries.

And I have lived in a closed primary state, where voter registration was partisan. In fact I was an officer in the county Democratic Party. The closed primary system did not prevent many people registering with the other party in order to ratfuck the opposition in the primary. So the argument that open primaries allow people to cross over is just so much rubbish. It happens anyway.

Just trying to preempt the usual arguments. My opinion, let everybody vote in primaries.