The "election" wasn't ruled unconstitutional. The provision whereby the public would have no access to the list of who voted was. Under the rules the legislature set up for the primary, ONLY the Democratic and Republican parties would have access to the lists of who participated. This was ruled unconstitutional because Michigan is a sunshine state and publicly funded things need to be covered under FOIA.
The ruling had nothing to do with the ballot, or with who was or wasn't on it.
The suggestion that Michigan's delegation should be seated as is is still ridiculous of course. It just doesn't have anything to do with the court ruling you're talking about.
The "Does the constitution not matter there," crack is particularly pathetic.
Got it, my bad.