Market Watch: Americas government may be closed, but its energy sector is open for business. We are overtaking Russia as the worlds largest oil and gas producer. Other countries with large reserves of natural resources have governments that are functional, yet their institutions and technology limit their production. Russias Kremlin is open, Saudi Arabias King Abdullah reigns supreme, and Chinese president Hu Jintao has his country firmly under control. But America is producing more oil because private sector...