Didnt they also ask her how she can be guiding the funds of the govt to invest in wind power and natural gas when she has a financial investment in wind and natural gas? Isnt there an ethical issue here?

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"To take from one, because it is thought his own industry and that of his father has acquired too much, in order to spare to others who (or whose fathers) have not exercised equal industry and skill, is to violate arbitrarily the first principle of association, "to guarantee to everyone a free exercise of his industry and the fruits acquired by it."

-Thomas Jefferson