'Beware': Expert flags 'hallmark' sign of huge energy shock in key midterm states

Patrick De Haan, an oil industry expert who runs Gas Buddy, had an ominous message for people in the Midwest: prepare to pay more at the pump — just before the election begins. "We've got the hallmark of a refinery issue in the Great Lakes — looking to discover what's cooking, but for now, wholesale gasoline up nearly 15c/gal while diesel up nearly…