Having known U.S. Sen. Joe Lieberman since the early 1970s, when he served as chairman of my American Jewish Committee chapter in New Haven, I recall how much I respected him as a young, liberal, public-spirited lawyer who really cared about the poor and disadvantaged in our society. Joe helped me distribute flyers on behalf of Cesar Chavez's United Farm Workers union. We ate lunch each week at the local vegetarian restaurant because, being an Orthodox Jew, he could not eat out anywhere else. Then again, I also sadly remember Joe's first run for statewide office, attorney general of Connecticut,...