New Jersey Governor Chris Christie reacts to a question during a news conference in Trenton, New Jersey, U.S. on March 28, 2014. REUTERS/Eduardo Munoz/File Photo

The logo of the Organization of the Petroleum Exporting Countries (OPEC) is pictured at its headquarters in Vienna, Austria, March 21, 2016. REUTERS/Leonhard Foeger

Front row left to right, executive producers and writers Larry Karaszewski, Scott Alexander and executive producer Brad Simpson, director Ryan Murphy, executive producer Nina Jacobson, director Anthony M. Hemingway and journalist Jeffrey Toobin, back row from left to right, cast members Malcolm-Jamal Warner, Sterling K. Brown, Sarah Paulson, John Travolta, Cuba Gooding Jr., Courtney B. Vance and David Schwimmer participate in a panel for the FX Networks "The People v. O.J. Simpson: American Crime Story" during the Television Critics Association (TCA) Cable Winter Press Tour in Pasadena, California January 16, 2016. REUTERS/Kevork Djansezian

Cast members Cuba Gooding Jr. and Sarah Paulson attend a panel for the television series "The People v. O.J. Simpson: American Crime Story" during the TCA FX Summer Press Tour in Beverly Hills, California U.S., August 9, 2016. REUTERS/Mario Anzuoni - RTSM8JV

(L-R) Ireland's Prime Minister Enda Kenny, Cyprus' President Nicos Anastasiades , Denmark's Prime Minister Lars Lokke Rasmussen, Germany's Chancellor Angela Merkel, Belgian Prime Minister Charles Michel and Italy?s Prime Minister Matteo Renzi attend the European Union summit- the first one since Britain voted to quit- in Bratislava, Slovakia, September 16, 2016. REUTERS/Yves Herman

(L-R) Ireland's Prime Minister Enda Kenny, Cyprus' President Nicos Anastasiades , Denmark's Prime Minister Lars Lokke Rasmussen, Germany's Chancellor Angela Merkel, Belgian Prime Minister Charles Michel and Italy?s Prime Minister Matteo Renzi attend the European Union summit- the first one since Britain voted to quit- in Bratislava, Slovakia, September 16, 2016. REUTERS/Yves Herman

The John Amos coal-fired power plant is seen behind a home in Poca, West Virginia May 18, 2014. REUTERS/Robert Galbraith/File Photo

Coal is transported via conveyor belt to the coal-fired Jim Bridger Power Plant that supplied by the neighboring Jim Bridger mine that is owned by energy firm PacifiCorp and the Idaho Power Company, outside Point of the Rocks, Wyoming March 14, 2014. REUTERS/Jim Urquhart/File Photo