
Democratic presidential nominee Hillary Clinton speaks as Donald Trump, the Republican nominee, looks on during the second presidential debate in St. Louis, Missouri, on Sunday, October 9. Trump and Clinton clashed on a range of issues.

Robots with portraits of presidential nominees Donald Trump and Hillary Clinton are seen before the second presidential debate in St. Louis, Missouri, on Sunday, October 9.

Summer Zervos -- a former contestant on Donald Trump's reality television show "The Apprentice" -- speaks at a news conference in Los Angeles on Friday, October 14. Zervos accused the Republican presidential nominee of sexual assault, saying Trump grabbed her breast and kissed her aggressively in 2007.

Kathleen Willey, left, Juanita Broaddrick and Kathy Shelton sit in the audience at the second presidential debate between presidential nominees Donald Trump and Hillary Clinton in St. Louis, Missouri, on Sunday, October 9. Trump held a news conference with the three women, as well as Paula Jones -- each of whom have in the past made allegations against Hillary and her husband, former President Bill Clinton -- less than two hours before the town hall-style debate.

Hillary Clinton boards her campaign plane on Friday, October 14, at Boeing Field in Seattle as she headed to Westchester, New York, for a weekend of debate preparation. Clinton spoke at a fundraiser and visited a campaign field office during her trip to Seattle.

House Speaker Paul Ryan speaks at the Waukesha County Business Alliance luncheon in Brookfield, Wisconsin, on Thursday, October 13. Ryan recently told his colleagues in the House that he would no longer defend or campaign for Republican presidential nominee Donald Trump.

President Barack Obama fist bumps with Nathan Copeland during the White House Frontiers Conference -- an event that explores the future of innovation around the globe -- in Pittsburgh, Pennsylvania, on Thursday, October 13. Copeland is paralyzed and uses a robotic arm controlled by a brain chip, which allows him to "feel."

Republican presidential candidate Donald Trump stands on stage with female supporters during a campaign rally Friday, October 14, in Charlotte, North Carolina.

First lady Michelle Obama speaks at a campaign rally for Democratic presidential nominee Hillary Clinton in Manchester, New Hampshire, on Thursday, October 13. The first lady delivered an impassioned speech condemning Republican presidential nominee Donald Trump for his remarks made in a recently unearthed video from 2007, where he is heard speaking about his sexually aggressive behavior toward women.

Green Party presidential nominee Jill Stein and her running mate, Ajamu Baraka, attend a rally in the Bronx, New York, on Thursday, October 13.

A man walks out of an absentee voting station after casting his vote for president in Fairfax, Virginia, on Wednesday, October 12. Election Day is Tuesday, November 8.

Democratic presidential nominee Hillary Clinton, left, talks with television host Ellen DeGeneres during a commercial break on "The Ellen DeGeneres Show" in Burbank, California, on Thursday, October 13.

Republican presidential nominee Donald Trump carries a 2-year-old boy named Hunter Tirpak, who was dressed like Trump, at a rally in Wilkes-Barre, Pennsylvania, on Monday, October 10.

Former US Sen. Ken Salazar, left, of Colorado embraces Democratic presidential nominee Hillary Clinton during a rally in Pueblo, Colorado, on Wednesday, October 12. The Clinton campaign announced that Salazar, who also served as President Barack Obama's secretary of the interior, will head the transition for a potential Clinton administration.

Republican vice presidential nominee Mike Pence speaks at a campaign rally in Newton, Iowa, on Tuesday, October 11.

Democratic vice presidential nominee Tim Kaine, center, appears with his wife Anne Holton, third from right, on the television show "The View" in New York on Thursday, October 13.

Members of the White House staff watch and take photos as President Barack Obama departs the White House in Washington on Thursday, October 13.

Former New York Mayor Rudy Giuliani introduces Donald Trump, the Republican presidential nominee, at a campaign rally in Cincinnati, Ohio, on Thursday, October 13.

The campaign plane of Democratic presidential nominee Hillary Clinton passes over New York en route to Miami on Tuesday, October 11.

Ivanka Trump, the daughter of Republican presidential nominee Donald Trump, fields questions from the audience during a campaign stop in Drexel Hill, Pennsylvania, on Thursday, October 13.

Supporters of Donald Trump, the Republican presidential nominee, gather next to a vehicle before a rally in West Palm Beach, Florida, on Thursday, October 13.

Democratic presidential nominee Hillary Clinton, right, attends a campaign rally with former Vice President Al Gore in Miami on Tuesday, October 11. The two focused on climate change, with Gore assuring the crowd that Clinton "will make solving the climate crisis a top national priority."

Donald Trump, the Republican presidential nominee, kisses a "Women for Trump" placard during a rally in Lakeland, Florida, on Wednesday, October 12.