Debate moderators always get a bad rap. As Jim Lehrer and Martha Raddatz demonstrated, candidates’ zealous supporters tend to blame the moderator if their champion doesn’t fare well. That’s not fair, but I do suggest moderators should be held accountable for whether they raise questions vital to the public’s understanding. We need moderators to press candidates to discuss fundamental issues that too often are cut out of the debate. And we need them to press for answers beyond the talking points and help Americans see where candidates really stand. For example, the plight and promise of our cities have been …