It's all about oil.
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So Trump, Saudi, and Russia will be on the same side, even as each backs a different side in the bloody Syrian kaleidoscope.
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The rest should politely disagree, and work among themselves on speedy action.  The Big Oil objective is to obstruct, so nothing is gained by appeasement.
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The first to kick the oil habit will be the big winner in technological advance, job creation, and trade balance.  Breaking the log jam will also improve national security for every EU country, for China, India, Japan, and almost everybody else.
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Nero fiddled while Rome burned.
Orange Clown tweets while America shrinks.
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In the end, Trump and Putin merely hasten the stately rise of Germany and China to world leadership: Barack Obama's successor is not Hilary Clinton, but Angela Merkel.
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Irony:
what neither the Kaiser nor the Fuhrer could win through war, is facilitated by the self-created vacuum of abdicated leadership in Washington.
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"Look on my Works, ye mighty and despair".