Short on the heels of another major refinery closure, Valero signaled it is considering closing its two California refineries that produce over 14% of the state’s gasoline. Refinery closures already have the state importing 8% of its gasoline supply, which means the state could soon have to significantly increase its imports of refined products such as gasoline, on top of its existing reliance on the Middle East and South America for the majority of its crude oil. Valero announced its profit is down significantly due to very low margins from its refinery business, prompting a question during its earning call...