InsideClimate: Since launching an investigation into the Mayflower, Ark. oil spill on April 2, state Attorney General Dustin McDaniel has pushed hard to resolve unanswered questions about the pipeline accident. McDaniel, a Democrat in his second term as attorney general, caused a stir on April 3 when he insisted on touring the site of the spill with his staff instead of in a bus tour organized by ExxonMobil, the company responsible for the 210,000-gallon pipeline rupture. He drew attention again when he was among...