If you care about free speech, you should pay attention to the campaign now being waged against Exxon Mobil. More than 50 environmental and civil rights groups have written Attorney General Loretta Lynch urging her to open a “federal probe” of the giant energy firm. Bernie Sanders and Hillary Clinton have also joined the chorus. The charge is that Exxon Mobil “systematically misled the public” on climate change, even as its executives recognized the dangers. New York’s attorney general has already launched an investigation . What’s behind the latest assault are two recent pieces of investigative journalism that, based on company documents, concluded that Exxon Mobil played a double game. In the 1970s, when global warming began attracting scientific attention, the firm “assembled a brain trust [that deepened] the company’s understanding” of climate change, reported InsideClimate News. But […]