@dagmaraka,
I guess the popular consensus is that if you have an even voice, don't flub, and enunciate, you're a good public speaker. Compare her to Jesse Jackson, Jr. When you change up inflection from wooden delivery. .. When you pause for effect---and
bring that effect... When you grab the podium or use your body to heighten the crowd's emotion...
That is what I call a good speaker. Plus, in her case, whipping up the crowd for the ticket...instead of herself and her husband and her values...would have been perfect.