As he campaigns for the Democratic nomination for president, Vermont Sen. Bernie Sanders (I) often sounds like he's running as much against me as he is the other candidates. I have never met the senator, but I know from listening to him that we disagree on plenty when it comes to public policy. Even so, I see benefits in searching for common ground and greater civility during this overly negative campaign season. That's why, in spite of the fact that he often misrepresents where I stand on issues, the senator should know that we do agree on at least one...