Hillary Clinton(01 of34)
Open Image ModalJeb Bush(02 of34)
Open Image ModalBen Carson(03 of34)
Open Image ModalRepublican presidential candidate Ben Carson speaks to the media before speaking at a gala for the Black Republican Caucus of South Florida at PGA National Resort on Nov. 6, 2015, in Palm Beach, Florida. (credit:Joe Raedle/Getty Images)
Chris Christie(04 of34)
Open Image ModalGOP Candidates(05 of34)
Open Image ModalRepublican presidential hopefuls Donald Trump (center) and Ted Cruz (right) check their watches as Ben Carson (left) looks on during a break in the Republican presidential debate in Las Vegas on Dec. 15, 2015. (credit:Robyn Beck/AFP/Getty Images)
Bernie Sanders(06 of34)
Open Image ModalDemocratic presidential candidate Sen. Bernie Sanders (I-Vt.) participates in an Internet live stream discussion about putting families first in developing immigration policy at his campaign office on Dec. 7, 2015, in Washington, D.C. (credit:Chip Somodevilla/Getty Images)
Scott Walker(07 of34)
Open Image ModalMartin O'Malley(08 of34)
Open Image ModalDemocratic presidential candidate and former Maryland Gov. Martin O'Malley meets with gun safety advocates on Sept. 14, 2015, in New York City. (credit:Andrew Burton/Getty Images)
Carly Fiorina(09 of34)
Open Image ModalRepublican presidential candidate Carly Fiorina speaks to the media before a town hall meeting Oct. 2, 2015, in Aiken, South Carolina. (credit:Sean Rayford/Getty Images)
Marco Rubio(10 of34)
Open Image ModalTed Cruz(11 of34)
Open Image ModalBen Carson(12 of34)
Open Image ModalRepublican presidential hopeful Ben Carson (left) poses for a photo with a fairgoer while touring the Iowa State Fair on Aug. 16, 2015, in Des Moines, Iowa. (credit:Justin Sullivan/Getty Images)
Ted Cruz(13 of34)
Open Image ModalRepublican presidential candidate Sen. Ted Cruz (R-Texas) speaks during a campaign rally at the Siena Community Center on Dec. 17, 2015, in Las Vegas. (credit:Ethan Miller/Getty Images)
Bernie Sanders(14 of34)
Open Image ModalDemocratic presidential candidates Sen. Bernie Sanders (I-Vt.), right, and Martin O'Malley are introduced at the Jefferson-Jackson Dinner on Oct. 24, 2015, in Des Moines, Iowa. The dinner is a major fundraiser for Iowa's Democratic Party. (Photo by Scott Olson/Getty Images) (credit:Scott Olson/Getty Images)
Marco Rubio(15 of34)
Open Image ModalScott Walker(16 of34)
Open Image ModalBernie Sanders(17 of34)
Open Image ModalJeb Bush(18 of34)
Open Image ModalCarly Fiorina(19 of34)
Open Image ModalBen Carson(20 of34)
Open Image ModalRepublican presidential candidate Ben Carson answers questions from members of the press after delivering brief remarks to supporters at the King Street Retail Walk on Oct. 16, 2015, in Alexandria, Virginia. (credit:Win McNamee/Getty Images)
Martin O'Malley(21 of34)
Open Image Modal(22 of34)
Open Image ModalORLANDO, FL - NOVEMBER 13: Republican presidential candidate Sen. Marco Rubio (R-FL) takes a drink of water as he speaks during the Sunshine Summit conference being held at the Rosen Shingle Creek on November 13, 2015 in Orlando, Florida. The summit brought Republican presidential candidates in front of the Republican voters. (Photo by Joe Raedle/Getty Images) (credit:Joe Raedle via Getty Images)
(23 of34)
Open Image ModalMEET THE PRESS -- Pictured: (l-r) New Jersey Gov. Chris Christie appears on 'Meet the Press' in Washington, D.C., Sunday, Sept. 13, 2015. (Photo by: William B. Plowman/NBC/NBC NewsWire via Getty Images) (credit:NBC NewsWire via Getty Images)
Hillary Clinton(24 of34)
Open Image ModalDonald Trump(25 of34)
Open Image ModalBernie Sanders(26 of34)
Open Image ModalDemocratic presidential candidate Bernie Sanders speaks during the Democratic National Committee 22nd Annual Women's Leadership Forum National Issues Conference at the Grand Hyatt in Washington, D.C., on Oct. 23, 2015. (credit:Leigh Vogel/WireImage via Getty Images)
Chris Christie(27 of34)
Open Image ModalJeb Bush(28 of34)
Open Image ModalCarly Fiorina(29 of34)
Open Image ModalTed Cruz(30 of34)
Open Image ModalHillary Clinton(31 of34)
Open Image ModalScott Walker(32 of34)
Open Image ModalBernie Sanders(33 of34)
Open Image ModalSupporters of Democratic presidential candidate Sen. Bernie Sanders (I-Vt.) gather at a watch party for a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on Oct. 13, 2015, in Las Vegas. (credit:Alex Wong/Getty Images)
Carly Fiorina(34 of34)
Open Image ModalRepublican presidential candidate Carly Fiorina greets supporters in the halls of the New Hampshire State House as she arrived to file for the state ballot on Nov. 5, 2015, in Concord, New Hampshire. (credit:Don Emmert/AFP via Getty Images)