Scott Adams says she had a resting bitch face ("rbf") and speculates that the surgery was to soften her look.

For those of you asking about the botched face job, she did that on purpose to look more black and have a better chance for the black vote if she's the VP pick. Before, she looked like what she is--half black, have (Asian) Indian and also a little harsher. This is a softening and a blackening.