She knows she has a problem between her server and Benghazi that she just can't shake. She tried to down play it ("What difference does it make now?") and that didn't work. Her server/FBI situation isn't good. If it is found some Foreign Power hacked her (China, Russia?) she's doomed.

That defense of "it's the mean old GOP out to get me" worked for Bill, but times were good and he could be likable. Times are serious and she is a mega biotch, so the defense isn't working so well for her.

"The Democrat Party looks like Titanic survivors. Partying and celebrating one moment, and huddled in lifeboats freezing the next". Hatari 2017

"Hokey religions and ancient weapons are no match for a good blaster at your side, kid." Han Solo