There are still nine months to go before the South Dakota Senate election between Minority Leader Tom Daschle and his Republican challenger, former Rep. John Thune. The campaign hasn’t really started yet, but you might as well get ready now for the post-election investigation into voting irregularities. It’s a sure thing. And while you’re at it, you might as well prepare for a murky end to that investigation. There might be clear evidence of wrongdoing, but no one will be found guilty of doing anything wrong. And then it will be on to the next election. Last week, we saw...