Comments on Congress: Why voters vote as they do

Maybe it's just a professional preoccupation, but I've always been intrigued by why voters cast their ballots as they do. I've never made a formal study of it but have talked with plenty of them over the years, and one thing sticks with me from those conversations: There's no one thing. People find a myriad of interesting-and sometimes idiosyncratic-reasons for voting this way or that.

Some car...