A poster of Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, stands outside of a home as snow falls in West Des Moines, Iowa, U.S., on Monday, Jan. 25, 2016. One week out from the first in the nation Iowa caucuses, where registering your vote isn’t as simple as casting a ballot, the state is starting to thrum with nervous energy. Photographer: Patrick T. Fallon/Bloomberg
Donald Trump, presumptive Republican presidential nominee, looks on from behind a curtain before walking on stage during a campaign event in San Diego, Calif.
Democratic presidential nominee Hillary Clinton waives as she walks on stage to accept her nomination during the fourth and final night of the Democratic National Convention at Wells Fargo Center on July 28, 2016 in Philadelphia.
People protest Donald Trump’s proposal to build a wall on the Mexico boarder in the streets outside the Republican National Convention (RNC) in Cleveland, Ohio, U.S., on Wednesday, July 20, 2016. Photographer: Patrick T. Fallon/Bloomberg
Hillary Clinton, presumptive 2016 Democratic presidential nominee, and Tim Kaine, presumptive 2016 Democratic vice presidential nominee, hug during a campaign event in Miami, Florida, U.S., on Saturday, July 23, 2016. Clinton named Virginia Senator Tim Kaine as her running mate for the Democratic presidential ticket, a widely-anticipated choice that may say more about how she wants to govern than how she plans to win in November. Photographer: Patrick T. Fallon/Bloomberg
A Secret Service agent stands guard in a sea of balloons after democratic presidential nominee Hillary Clinton accepted her nomination during the fourth and final night of the Democratic National Convention at Wells Fargo Center on July 28, 2016 in Philadelphia, Pennsylvania. AFP PHOTO/PATRICK T. FALLON
Ann Rushton places a dollar into a “Trump University” vending machine art piece during the “Politicon” convention in Pasadena, California, U.S. June 25, 2016. REUTERS/Patrick T. Fallon
A supporter wears a shirt featuring pictures of Senator Bernie Sanders before a campaign event in Carson, Calif.
Anti-Trump protesters, right, clash with Trump supporters, left, following a campaign event for Donald Trump in San Diego, Calif.
Senator John McCain, a Republican from Arizona, receives a hug from the school mascot during a campaign event at Grand Canyon University ahead of the August 30 primary election in Phoenix, Arizona, U.S., on Thursday, August 11, 2016. Photographer: Patrick T. Fallon/Bloomberg
A cat walks past a window as Democratic party voters caucus for Hillary Clinton and Bernie Sanders in the living room of private residence during the first-in-the-nation Iowa caucus in rural Deep River, Iowa, U.S., on Monday, Feb. 1, 2016. Hours before Iowans have their say Monday night on who they think should be the next U.S. president, candidates crisscrossed the state in an attempt to turn out every single supporter.
Hillary Clinton speaks at the University of Southern California during a round table discussion in Los Angeles.
Jeb Bush, former governor of Florida and 2016 Republican presidential candidate, is seen through an American flag as he speaks during a campaign event at Dordt College in Sioux City, Iowa.
Elizabeth Morales of San Bernardino County stands for a photograph with a poster and Bernie Sanders purse during a campaign event for Senator Bernie Sanders at The Wiltern in Los Angeles
The remains of a tomato thrown by a protester at Donald Trump rests below flags after an event in Iowa City, Iowa.
Donald Trump waves to the crowd during a rally aboard the Battleship USS Iowa in San Pedro, Calif.
A registration sign covers a portrait of former President Richard Nixon during a Democratic presidential candidate Bernie Sanders campaign event at the LA Memorial Sports Arena in Los Angeles
Jeb Bush raises himself on his toes next to Donald Trump as the 2016 Republican presidential candidates stand on stage before the Republican presidential debate at the Ronald Reagan Presidential Library
Homemade cupcakes bear the names of the top 11 GOP candidates before the Republican presidential debate at the Ronald Reagan Presidential Library
Carly Fiorina stands on stage alongside Chris Christie, John Kasich, Scott Walker, and Jeb Bush during the Republican presidential debate at the Ronald Reagan Presidential Library
Senator Barack Obama speaks to a crowd of over 100,000 supporters and undecided voters gathered underneath the St. Louis Gateway Arch next to the Mississippi River on Oct. 18, 2008 in St. Louis, Missouri.
Barack Obama waves on stage with Michelle Obama at Grant Park after becoming the country’s first black president. Thousands of people attended the historic event at Grant Park in Chicago on Nov. 4, 2008.
Republican presidential candidate Rick Santorum speaks to the media in front of a wild west mural at Pizza Ranch as he campaigns to gain support the Iowa Caucus on Tuesday, December 6, 2011 in Spencer, Iowa.
Alice Stewart, spokeswoman for Republican presidential candidate Michele Bachmann, speaks to the media in the spin room after the ABC News Republican Debate at Drake University leading up to the Iowa Caucuses on Saturday, December 10, 2011 in Des Moines, Iowa.
The cold December landscape of bare branches and grain elevators is reflected in a wreath-decordated window as Republican presidential candidate and Texas Gov. Rick Perry speaks during a visit to the Copper Cup Coffee shop as part of his bus tour campaign for the Iowa Caucuses on Friday, December 16, 2011 in Cherokee, Iowa.
Republican presidential candidate Michele Bachmann shakes hands at Elly’s Coffee shop during a brief campaign event to gain support in the Iowa Caucuses on Wednesday, December 21, 2011 in Muscatine, Iowa.
Cell phones decorated with Obama VOTE stickers await Organizing For America volunteers during a phone bank leading up to the caucuses at a local Panera on Thursday, December 22, 2011 in Johnston, Iowa.
Army soldier Michael Quigley and his dad, Army Veteran Patrick Quigley, and son Roger Quigley, 17, right, watch Ron Paul speak during his “Salute to Veterans” rally at the Iowa State Fairgrounds leading up to the Iowa Caucuses on Wednesday, December 28, 2011 in Des Moines, Iowa.
Mary Kelly, right, of Des Moines raises her hands during musical prayer and worship with congregation members at Cornerstone Family Church leading up to the Iowa Caucuses on Sunday, January 1, 2012 in Des Moines, Iowa.
An image touting Mitt Romney as a flip flopper flashes on screen from a Ron Paul advertisement during a football game commercial break at the City Center Lounge leading up to the Iowa Caucuses on Sunday, January 1, 2012 in Des Moines, Iowa.
Michele Bachmann’s clothing rests in her campaign bus on the eve of the Iowa Caucus, Monday, January 2, 2012 in West Des Moines, Iowa.
Republican presidential candidate Texas Gov. Rick Perry kisses wife Anita Perry while speaking to his “Iowa Strike Force” volunteers before the start of training at the Sheraton hotel on Caucus Day on Tuesday, January 3, 2012 in West Des Moines, Iowa.
Workers set up decorations for Republican presidential candidate Newt Gingrich’s caucus night festivities at Veterans Auditorium on Caucus Day, Tuesday, January 3, 2012 in Des Moines, Iowa.
Kathy Rust, right of Glendale, Calif. reaches to ring a bell after a successful phone call while phone banking with Joan Curd, rear, for Mitt Romney in a multi-purpose room at Brady Industries, Inc. on the eve of the Nevada Republican Caucus on Friday, February 3, 2012 in Las Vegas, Nevada.
David Kitainik, right, with his sons Moshe, 11, left, and Aryehzev, 12, right, during the special evening caucus for people, mostly Jewish and Seventh Day Adventist, who were not able to vote due to religious reasons at the Adelson Educational Campus on caucus day, Saturday, February 4, 2012 in Las Vegas, Nevada. Those who would not sign an affidavit under penalty of perjury were asked to leave and were not allowed a ballot.
Caucus goers arrive for voting in the Republican Presidential Caucus in Clive Precinct 4 at the DeWaay Capital Management building on Caucus Day on Tuesday, January 3, 2012 in Clive, Iowa.
Caucus tellers count the votes in the Republican Presidential Caucus at Clive Precinct 4 at the DeWaay Capital Management building on Caucus Day on Tuesday, January 3, 2012 in Clive, Iowa. Romney received 238 votes, while Huntsman received just 1 vote.
Supporters of Republican presidential candidate Newt Gingrich in Veterans Auditorium at the Iowa Events center on Tuesday, January 3, 2012 in Des Moines, Iowa.
Callista Gingrich takes the stage with her husband, Republican presidential candidate Newt Gingrich before he speaks after a poor performance in the Iowa Caucus in Veterans Auditorium at the Iowa Events center on Tuesday, January 3, 2012 in Des Moines, Iowa.
Balloons decorate a door as Republican presidential candidate Rick Santorum celebrates his victory at Stoney Creek Inn on Caucus Night on Tuesday, January 3, 2012 in Johnston, Iowa.