FILE - In this March 21, 2016 file photo,New York Attorney General Eric Schneiderman speaks at a new conference in New York. Escalating a political fight over global warming, House Science Committee Chairman Rep. Lamar Smith, R-Texas, issued subpoenas Wednesday, July 13, 2016, to Schneiderman and Massachusetts Attorney General Maura Healey, seeking records about their investigation into whether Exxon Mobil misled investors about global warming. (AP Photo/Seth Wenig, File)