San Diego, California (CNN) -- Dear Sen. John McCain: Say it ain't so. For many of us who have -- over the years -- admired your courage in tackling difficult issues, this was a painful and disappointing week. A dozen years ago, I was writing a column for the Arizona Republic when I saw a story about your jaw-dropping support from Latino voters. You earned 60 to 70 percent of the Latino vote in re-election campaigns. You were quoted as saying that it was your "honor" to be well thought of by a population for which you had great respect....