Romney’s contention is that if US oil production were higher, gasoline prices would be lower. If he winds the Nov. 6 election, he will make sure there is more production. The price claim is a great debate line, but is also untrue. Traders treat oil as a single great global pool, which is why a pipeline explosion in Nigeria can send up prices in Fargo, North Dakota. Look for the accusations to continue over the next 18 days.

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