Does Hillary Clinton have a trustworthiness problem? We ask the question in that manner because we’re talking here about voter perception of Mrs. Clinton more than our judgment of her character per se. Reports of the appearance of conflicts of interest between her role as secretary of State and foreign donations to her family foundation have generated lots of headlines in recent days. It’s possible that those reports are already taking a toll on her image. Clintonworld is surely worried that might happen. On Sunday, the Clinton Foundation hit back with a lengthy rebuttal of some of the allegations of...