West Virginia Attorney General Patrick Morrisey (R) is leading a 19-state coalition in opposition to EPA’s threshold proposal to again find regulation of power plants’ air toxics “appropriate and necessary” (A&N) under the mercury and air toxics standards (MATS), despite broad support for the finding from power sector and many other industry groups. In April 11 comments on EPA’s proposal, Morrisey and the AGs of Alabama, Arkansas, Indiana, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Montana, Nebraska, North Dakota, Ohio, Oklahoma, South...