National Journal: Big Oil has hit rough waters at a critical time. Politically, the Democratic White House front-runner is getting more belligerent toward the oil industry. On Thursday Hillary Clinton joined calls for a Justice Department probe into whether Exxon has pulled the wool over the publics eyes on global warming (something the company vigorously denies). She said in New Hampshire that theres a lot of evidence that they misled. Its part of her broader move to the left...