Her political philosophy was a distilled essence of modern libertarianism, and it did not rest, or need to rest, on Objectivism.
Objectivism itself is much more forgettable than her works.
Alas, no .... her political philosophy turns out to be a distilled essence of Hollywood ethics. And given the many idiocies spouted by modern libertarians, it is hard to discern which party in your comparison has suffered the worst insult.
I would say that her political philosophy was simply Americanism, based on the principles of the Declaration of Independence.
All men have the right to life, liberty and the pursuit of happiness and this was the essence of her political philosophy.
She rejected any philosophy or relationships that would make the individual a slave to someone elses goals and ends.