How can something that is such a sure thing seem so shaky? That’s the question that many supporters of Hillary Clinton are wondering this week as reports about her exclusive use of a private email account while serving as secretary of state prove to be the latest indication of her bad political judgment. Though many Democrats insist that there’s nothing to this story, others speaking off the record to journalist are less sanguineand admit that this just the latest evidence that shows that her apparent coronation as Democratic presidential nominee is only partially obscuring her genuine shortcomings as a candidate. Though Clinton’s loyalists are bravely, if somewhat inadequately, defending her, the email story looks to have legs. The real question many in the part are asking today is whether the former First Lady’s current troubles will be enough to tempt Senator Elizabeth Warren to jump into the 2016 presidential race.