She has a Narcissitic Borderline Personality Disorder, a mental illness. So, she can function quite well, but she really BELIEVES that she has capabilities she does NOT possess. She is not intellectually able to handle most any job without signifcant assistance. She is a great actress, but has little empathy for others. Her own family has been used as props for her emotional fulfillment.

Her speeches (as at the Republican Convention) were prepared by others. She read it well. She lied about the teleprompter breaking down and that she gave it spontaneously. (The techicians and others saw the teleprompters working perfectly.) Google Palin and lies. She has a pathological history of lying.
She also has a history of getting revenge with anyone who crosses her. She is far too unstable to hold any public office. Those who support her without question are identifying with her lack of education and struggles, as someone tryiny to get ahead...but don't be hooked by her manipulations...she's a user.