Is This The Beginning of the End for Hillary's Presidential Ambitions?

This story isn't getting much play on liberal websites, but I think Hillary's campaign might have reached an inflection point because of it (from Political Wire):

A former Hillary Clinton staffer who helped set up the former secretary of state’s private email server has vowed to invoke the Fifth Amendment and refuse to answer questions after a congressional committee subpoenaed him, NBC News reports.

First Read says the news “is yet another reminder how this email story is out of her control. After all, what’s in the best interests of the campaign (Team Clinton released a statement that they wanted the former aide, Bryan Pagliano, to testify) isn’t necessarily in the best interests of everyone involved (Pagliano’s lawyer certainly thought otherwise). And when that dynamic is at play, things are no longer in your hands.”

Hillary's campaign will attempt to explain this away by saying this has nothing to do with her; but once folks associated with Hillary start invoking the Fifth Amendment, I think that probably signals the beginning of the end for her campaign.

The same thing happened to Chris Christie.  Prior to BridgeGate, Christie was considered a top candidate for the GOP nomination in 2016.  Not anymore -- BridgeGate ended all that, even though there is no evidence [yet] that Christie had any direct involvement in that scandal. 

One thing is for sure -- this means that Biden will definitely get into the race.