If all this sounds familiar, think Florida 2000. In that Presidential recount, officials couldn't decide what counted as a legal vote, and so different counties used different standards. The Florida Supreme Court made things worse by changing the rules after the fact. In Bush v. Gore, the U.S. Supreme Court ruled that this violated Constitutional principles of equal protection and due process, which require that every vote be accorded equal weight.
This will be a basis for Mr. Coleman's appeal to the Minnesota Supreme Court. Should that body be reluctant to publicly rebuke their judicial colleagues who sat on the contest panel, Mr. Coleman could also take his appeal to federal court. This could take months.
Another solution is to hold a special Senate election. Minnesota law does not specifically provide for such a runoff. However, the U.S. Constitution's 17th amendment does provide states with a roadmap for filling "vacancies," which might be a legal starting point for a do-over. Even before the shifting standards of the contest trial, the St. Paul Pioneer Press looked at the ballot-counting evidence and called for a revote. It could be that this is where the court case is leading in any event.
Democrats want to portray Mr. Coleman as a sore loser and make the Republican worry that he will ruin his chances for other political office. But Mr. Coleman has a legitimate grievance that not all votes have been treated equally. If the Franken standard of disparate absentee-voter treatment is allowed to stand, every close election will be settled by a legal scramble to change the vote-counting rules after Election Day. Minnesota should take the time to get this one right.
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