The support of Robert Reich, for Bernie Sanders definitely does hurt the Hillary Clinton campaign, since he was the former Secretary of Labor under the Bill Clinton Administration. Further as an economist and author his support for Bernie Sanders economic plans boosts Sanders campaign. According to Robert Reich, Sander's policy aims towards working not just for a select few.
Support of Robert Reich for Bernie Sanders does hurt the Hillary Clinton campaign because Reich's economic stances are somewhat different than Hillary Clinton's and more aligned with the socialist aspects of Bernie Sanders. If anything, Reich was too conservative for Bill Clinton and makes a good fit for the Sanders campaign.
Robert Reich, the former Secretary of Labor under the Bill Clinton Administration, has recently come out in support of Bernie Sanders. However, I do not feel that this will hurt Hillary's campaign. Robert served under president Clinton, not president Obama. He has no direct experience working with Hillary Clinton as Secretary of State.
No, the support of Robert Reich for Bernie Sanders does not hurt the Hillary Clinton campaign because Robert Reich is not a familiar name to the general American public. Hillary Clinton is poised to significantly defeat Bernie Sanders on Super Tuesday and at this point, it seems likely that she will emerge as the Democratic presidential nominee.