Arkansas' first lady Hillary Rodham Clinton is seen in her inaugural ball gown in this 1985. (AP)
Arkansas Governor Bill Clinton, and his wife Hillary are seen during a reception at the US Ambassadors residence in Brussels, Belgium, Sept. 30, 1987. (AP)
Hillary Rodham Clinton and daughter Chelsea applaud as Bill Clinton announces his intention to run for president, Oct. 3, 1991. (AP)
Hillary Rodham Clinton surrounded by supporters of her husband at a Washington campaign rally on Wednesday, Feb. 26, 1992. (AP)
First Lady Hillary Rodham Clinton speaks at the Laborer's International Union's Tri-Fund Conference, being held in Miami Beach, Florida, Feb. 6, 1995. (Photo/AP)
First lady Hillary Rodham Clinton smiles while being greeted prior to testifying before the committee on Capitol Hill in Washington on Sept. 28, 1993. (AP)
First lady Hillary Rodham Clinton looks over a bust of President Bill Clinton during a visit to the U.S. Soldier's and Airmen's Home in Washington on Dec. 21, 1994. (AP)
First lady Hillary Rodham Clinton smiles during a visit to Chicago's famed Billy Goat Tavern Wednesday, Aug. 28, 1996. (AP)
First lady Hillary Rodham Clinton, left, meets with Princess Diana at the White House Wednesday, June 18, 1997. (AP)
President Clinton and first lady Hillary Rodham Clinton talk with Yeni Wong, owner of the Golden Palace restaurant, after lunch Sunday, Dec. 27, 1998. (AP)
President Bill Clinton, first lady Hillary Rodham Clinton and their daughter, Chelsea, pose with actress Elizabeth Taylor in Washington, D.C., Dec. 31, 1999. (AP)
President Clinton and first lady Hillary Rodham Clinton sit in the Oval Office after delivering a New Year's Day address, Saturday, Jan. 1, 2000. (AP)
Sen. Hillary Rodham Clinton, D-N.Y., talks to journalists outside in Washington, Sunday Dec. 9, 2001. (AP)
Sen. Hillary Rodham Clinton, D-N.Y., is surrounded by well-wishers at a City Hall event celebrating Martin Luther King Jr. Day, Jan. 21, 2002 in New York. (AP)
Former President Bill Clinton and Sen. Hillary Rodham Clinton (D-NY) arrive at the Broadway musical "Avenue Q," Saturday, Dec. 27, 2003 in New York. (AP)
Sen. Hillary Rodham Clinton, D-N.Y., speaks at an event, Saturday, Jan. 3, 2004, in St. Louis, for Senate candidate Nancy Farmer, Missouri's state treasurer. (AP)
Sen. Hillary Rodham Clinton, D. N.Y., right, talks with Sen. Dianne Feinstein, D-Calif., on their way to voting on the Deficit Reduction Act on Wednesday, Dec. 21, 2005. (AP)
Senator Hillary Clinton, D-NY, gestures as she speaks, Thursday, Dec. 21, 2006, in the Harlem section of New York, at Miracle on 138th Street. (AP)
U.S. Sen. Hillary Clinton, D-N.Y., acknowledges a standing room only crowd at a town meeting in Keene, N.H., Sunday, Feb. 11, 2007. (AP)
President-elect Barack Obama and Secretary of State-designate Sen. Hillary Rodham Clinton, D-N.Y., after a news conference in Chicago, Dec. 1, 2008. (AP)
Secretary of State Hillary Rodham Clinton walks with her entourage while attending the United Nations Climate Change Conference, Friday, Dec. 18, 2009. (AP)
Secretary of State Hillary Rodham Clinton speaks about the Afghanistan-Pakistan Annual Review, Thursday, Dec. 16, 2010, at the White House. (AP)
In this June 10, 2011 file photo, Secretary of State Hillary Rodham Clinton waves as the arrives at Lusaka International Airport in Lusaka, Zambia. (AP)
US Secretary of State Hillary Rodham Clinton during her press conference at Stormont Castle in Belfast as part of her four-day trip to Europe, Dec. 7, 2012. (AP)
Former Secretary of State Hillary Rodham Clinton speaks after receiving the 2013 Lantos Human Rights Prize during a ceremony in Washington, Dec. 6, 2013. (AP)
In a Dec. 16, 2014 file photo, former Secretary of State Hillary Rodham Clinton speaks after accepting the Robert F. Kennedy Ripple of Hope Award. (AP)
Hillary Rodham Clinton speaks at an event Monday, March 23, 2015. (AP)