Only when plots needs it. Most of the time, it's because of her the trouble is caused. And she refuses to take responsibility, saved by luck, blames others and doesn't learn her lesson.
She's a sociopath. She does what she wants and doesn't much give a shit about others. How many people did she sacrifice for her own safety? Evil bitch.
Although the president a little bit nut in the head but it seem I didn't hate her. She's craziness can save life sometime