Her health sucks. I looked online and discovered this isn't the first time she's had one of these:
The hearing lasted 11 hours.
How long in hours does a four year term as President last?
I noticed part way through she was repeatedly holding her head up with her hand. After a break one of her 'handlers' told her to stop it b/c it makes her look like she's too tired to take anymore questions. She never held her head up with her hand after that.
Look carefully at her face in the first few minutes compared to the last few minutes.
Stop making excuses for her.
She's the one applying for the fucking job. If she doesn't have the vitality to do the job she shouldn't apply. Period!