Former French Economy Minister and candidate for the left-wing primaries ahead of the 2017 presidential election Arnaud Montebourg answers journalists' questions during a press conference in front of a factory of the French multinational trainmaker Alstom on September 14, 2016, in Belfort, eastern France. France's Socialist government clashed with trainmaker Alstom on September 13, 2016 over the company's plans to close a historic plant, throwing into focus the state's policy of intervening to shore up a shrinking manufacturing base. / AFP PHOTO / Sebastien BozonSEBASTIEN BOZON/AFP/Getty Images

Former French Economy Minister and candidate for the left-wing primaries ahead of the 2017 presidential election Arnaud Montebourg answers journalists' questions during a press conference in front of a factory of the French multinational trainmaker Alstom on September 14, 2016, in Belfort, eastern France. France's Socialist government clashed with trainmaker Alstom on September 13, 2016 over the company's plans to close a historic plant, throwing into focus the state's policy of intervening to shore up a shrinking manufacturing base. / AFP PHOTO / SEBASTIEN BOZONSEBASTIEN BOZON/AFP/Getty Images

Former French Economy Minister and candidate for the left-wing primaries ahead of the 2017 presidential election Arnaud Montebourg waves as he leaves a press conference held in front of a factory of the French multinational trainmaker Alstom on September 14, 2016, in Belfort, eastern France. France's Socialist government clashed with trainmaker Alstom on September 13, 2016 over the company's plans to close a historic plant, throwing into focus the state's policy of intervening to shore up a shrinking manufacturing base. / AFP PHOTO / Sebastien BozonSEBASTIEN BOZON/AFP/Getty Images

Former French Economy Minister and candidate for the left-wing primaries ahead of the 2017 presidential election Arnaud Montebourg answers journalists' questions during a press conference in front of a factory of the French multinational trainmaker Alstom on September 14, 2016, in Belfort, eastern France. France's Socialist government clashed with trainmaker Alstom on September 13, 2016 over the company's plans to close a historic plant, throwing into focus the state's policy of intervening to shore up a shrinking manufacturing base. / AFP PHOTO / SEBASTIEN BOZONSEBASTIEN BOZON/AFP/Getty Images

Former French Economy Minister and candidate for the left-wing primaries ahead of the 2017 presidential election Arnaud Montebourg leaves a press conference, next to Montebourg's spokesperson Francois Kalfon (L), in front of a factory of the French multinational trainmaker Alstom on September 14, 2016, in Belfort, eastern France. France's Socialist government clashed with trainmaker Alstom on September 13, 2016 over the company's plans to close a historic plant, throwing into focus the state's policy of intervening to shore up a shrinking manufacturing base. / AFP PHOTO / SEBASTIEN BOZONSEBASTIEN BOZON/AFP/Getty Images

Carl Icahn gives an interview on FOX Business Network in New York, February 2014. REUTERS/Brendan McDermid

Former French Economy Minister and candidate for the left-wing primaries ahead of the 2017 presidential election Arnaud Montebourg poses in front of a factory of the French multinational trainmaker Alstom on September 14, 2016, in Belfort, eastern France. France's Socialist government clashed with trainmaker Alstom on September 13, 2016 over the company's plans to close a historic plant, throwing into focus the state's policy of intervening to shore up a shrinking manufacturing base. / AFP PHOTO / SEBASTIEN BOZONSEBASTIEN BOZON/AFP/Getty Images

Former French Economy Minister and candidate for the left-wing primaries ahead of the 2017 presidential election Arnaud Montebourg (C) speaks with Party Socialist's city councillor Samia Jaber (R) at La Maison du peuple on September 14, 2016, in Belfort, eastern France. France's Socialist government clashed with trainmaker Alstom on September 13, 2016 over the company's plans to close a historic plant, throwing into focus the state's policy of intervening to shore up a shrinking manufacturing base. / AFP PHOTO / SEBASTIEN BOZONSEBASTIEN BOZON/AFP/Getty Images