Exxon, Chevron Begin Pushing Back Against Warren’s Fracking Ban

(Bloomberg) -- America’s two biggest oil companies are starting to push back against the fracking ban touted by the leading candidates for the Democratic presidential nomination, which may become one of the most consequential flashpoints for energy markets during the election campaign.Exxon Mobil Corp. and Chevron Corp. executives spoke out publicly against the proposals for the first time on Friday, saying they would shift profits from crude production from the U.S. to other countries, an