Finally, on voter turnout:
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Look around the World: Democracy is the true source of prosperity, security, and liberty. It is a treasure beyond value.
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To engage in vote suppression, or vote rigging generally, you have to view others as being less-than-equal citizens. Ultimately, you have to hate democracy.
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For 140+ years oil has been anaethma to democracy.  No country has  ever become a democracy after finding oil.
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Since 1985, Big Oil has systematically bought up right-wing political parties as the best way to stop anything being done about Climate Change.  
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Last year, Russia, (essentially a big, wildly corrupt oil company) attacked US elections - and succeeded.  The GOP was furious at being out-cheated at its own game by anybody else.
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But why is destruction of democratic government by a hostile foreign government any worse than by a hostile oil company?
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It's all about Oil.
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In Oil v. Democracy, democracy is losing.
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We can do without oil.
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We cannot do without democracy.