 With a stop in Iowa on Tuesday, the Presidential candidate Hillary Clinton officially embarked on a nineteen-month marathon of looking concerned. Sitting with patrons at Jones Street Java House, in Le Claire, the former Secretary of State listened intently, sipped from a cup of coffee, and nodded her head at appropriate junctures, flawlessly renacting a brief scene from her first campaign video. After about twenty minutes of virtually nonstop displays of empathy, a Clinton aide said, we decided to shut it down. Hillary is staring down nineteen months of sipping coffee and nodding her head, the aide continued. We want to make sure she paces herself. After her Iowa visit, Clinton is scheduled to bring her looks of concern to New Hampshire, South Carolina, and other early primary states. 