If you enjoyed paying $1.59 a gallon for gas this past weekend, understand a few things. To the extent domestic production affects this, the oil industry is mostly gettings its resources on private lands. That's because Obama, while he's happy to take credit for the increased productivity and lower prices, is fighting new leases on federal lands wherever he can. That's how he can reassure his left-wing base he's an enemy of the oil industry while also taking credit for the low prices. But there is some oil being extracted on federal lands, and if that stopped all at once,...