Health issues and age (she will be 2nd oldest behind Reagan) could keep her out.
"Weekend At Bernie's 2016".
She can say Benghazi is part of Norway, fall, stumble, run into things, forget the year, forget where she is, and forget her name, and the MSM won't report on it.
If she’ll be 70 by Election Day, and she wins, she would be the oldest ever.