(FILES) This file photo taken on July 15, 2013 shows former US President George H.W. Bush attending a White House ceremony to recognize the Points of Light volunteer program in Washington, DC. Former president George H.W. Bush plans to vote for Hillary Clinton in November, the niece of president John F. Kennedy wrote in a September 20, 2016 Facebook posting. "The President told me he's voting for Hillary!!" read the caption of a picture Kathleen Kennedy Townsend posted on Facebook, as she shook the 92 year-old ex-president's hand. / AFP PHOTO / JIM WATSONJIM WATSON/AFP/Getty Images

US Senator Elizabeth Warren, Democrat of Massachusetts, questions John Stumpf, chairman and CEO of Wells Fargo, as he testifies about the unauthorized opening of accounts by Wells Fargo during a Senate Banking, Housing and Urban Affairs Committee hearing on Capitol Hill in Washington, DC, September 20, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

US Senator Elizabeth Warren, Democrat of Massachusetts, questions John Stumpf, chairman and CEO of Wells Fargo, as he testifies about the unauthorized opening of accounts by Wells Fargo during a Senate Banking, Housing and Urban Affairs Committee hearing on Capitol Hill in Washington, DC, September 20, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

US Senator Elizabeth Warren, Democrat of Massachusetts, holds up copies of Wells Fargo earnings call transcripts as she questions John Stumpf, chairman and CEO of Wells Fargo, as he testifies about the unauthorized opening of accounts by Wells Fargo during a Senate Banking, Housing and Urban Affairs Committee hearing on Capitol Hill in Washington, DC, September 20, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

US Senator Elizabeth Warren, Democrat of Massachusetts, questions John Stumpf, chairman and CEO of Wells Fargo, as he testifies about the unauthorized opening of accounts by Wells Fargo during a Senate Banking, Housing and Urban Affairs Committee hearing on Capitol Hill in Washington, DC, September 20, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

US Senator Elizabeth Warren, Democrat of Massachusetts, questions John Stumpf, chairman and CEO of Wells Fargo, as he testifies about the unauthorized opening of accounts by Wells Fargo during a Senate Banking, Housing and Urban Affairs Committee hearing on Capitol Hill in Washington, DC, September 20, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

WASHINGTON, DC - SEPTEMBER 20: (L-R) Executive Vice President for the Agriculture Division of the E. I. DuPont de Nemours and Company James Collins, President and CEO of Dow AgroSciences, LLC, Tim Hassinger, CEO of Syngenta International AG Erik Fyrwald, President and CEO of Bayer CropScience North America Jim Blome, Executive Vice President and Chief Technology Officer of the Monsanto Company Robb Fraley, President of the American Antitrust Institute Diana Moss, Chief Economist and Deputy Executive Director of Public Policy for the American Farm Bureau Federation Bob Young, CEO of the National Corn Growers Association Chris Novak, and President of the National Farmers Union Roger Johnson are sworn in during a hearing before the Senate Judiciary Committee September 20, 2016 on Capitol in Washington, DC. The committee held a hearing on "Consolidation and Competition in the U.S. Seed and Agrochemical Industry." (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - SEPTEMBER 20: (L-R) CEO of Syngenta International AG Erik Fyrwald, President and CEO of Bayer CropScience North America Jim Blome, and Executive Vice President and Chief Technology Officer of the Monsanto Company Robb Fraley take their seats prior to a hearing before the Senate Judiciary Committee September 20, 2016 on Capitol in Washington, DC. The committee held a hearing on "Consolidation and Competition in the U.S. Seed and Agrochemical Industry." (Photo by Alex Wong/Getty Images)