Charles Lane, Washington Post
In blackjack, doubling down is a high-risk, high-reward move. If you think you can win, based on the first two cards dealt, you bet 100 percent more "” but you also pay for the privilege by agreeing to take one, and only one, additional card.Doubling down is also the semi-official metaphor of President Obama's energy strategy, as we know from his speech in Cleveland last week: "My plan would end the government subsidies to oil companies that have rarely been more profitable "” let's double down on a clean-energy industry that has never...