add category, also add "Charles is considered to be more politically motivated than his younger brother David."
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The Koch brothers' wealth and repeated attempts to gain political influence have advanced a number of candidates at the state and federal levels. Sometimes they secretly fund harmful causes while concealing their role.
The Koch brothers' wealth and repeated attempts to gain political influence have advanced a number of candidates at the state and federal levels. Sometimes they secretly fund harmful causes while concealing their role.
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There are additional Koch brothers who do not participate in the political projects of Charles and David.
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There are additional Koch brothers who do not participate in the political projects of Charles and David. Charles is considered to be more politically motivated than his younger brother David.